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| Engine swap w/ and w/o adapter plate https://www.slantsix.org/forum/viewtopic.php?t=66205 |
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| Author: | a100gary [ Wed Sep 22, 2021 9:38 am ] |
| Post subject: | Engine swap w/ and w/o adapter plate |
The engine in my A100 pickup is a 1965 /6 with adapter plate. I have a 1976 slant (both 225's) that I want to swap in that doesn't use an adapter plate and I am concerned that the lack of an adapter plate will make the motor mounts bolts miss their attachment holes by 1 1/8". Is there a way to correct this? or is this not a problem? Don't want to be swinging the engine through the cab only to find out that I overreach the engine mounts? Gary |
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| Author: | GTS225 [ Wed Sep 22, 2021 10:23 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
I am not familiar with the trans mount crossmember in an A100. That being said, can you move it forward the needed amount and re-drill the frame holes to match the crossmember? An alternative might be a 1/4" flat plate to "bridge the gap", so to speak, between your crossmember mounting pad, and the trans mounting pad. I did that in my T-bucket, and it's been operational for 9 years. (Sorry, no pic available.  )Roger |
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| Author: | volaredon [ Wed Sep 22, 2021 10:30 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
I had a response here, hit "submit" and then wifi kicked in, saying "I wasn't safe" went "back to safety" and lost it. I'll repost what I had said after work if someone don't beat me to it |
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| Author: | Daddiojoe [ Wed Sep 22, 2021 11:34 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Is the adapter plate to a 727 transmission? If you don't need it, please sell it to me. Or I have headers or Dutra dual rear to trade. Thanks, Joe |
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| Author: | volaredon [ Wed Sep 22, 2021 2:48 pm ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
As far as a swap goes, the engines are the same////except for 1 small detail, the 76 engine will go right in. You'll need the adapter ring for the converter snout, where it fits in the pilot at the end of the crank. as far as the trans adapter, its for the sake of the trans, not the engine. Back then, they did not make a 727 trans to directly bolt to a /6 til around '68. so until then, they had to adapt a V8 trans to the /6. If you find a 68 or newer 727 that is made for the /6, it will bolt right to the engine with no adapter needed/ BUT then the trans will set the thickness of the adapter further forward, meaning you might have to modify the rear trans mount to compensate/ and your kickdown linkage/ that would need to be made shorter. Then the driveshaft might need to be made a bit longer, as the yoke might then not be long enough to engage the output shaft of the trans deep enough....... I have never had my hands on one of these adapters, I have only heard of them, I am not sure how thick they are. But for the most hassle free engine swap, put the adapter onto your replacement /6 and run it as it is now, and nothing will need modification /except to slip that collar inside the pocket within the end of the crank.... Charrlie here on the forum used to sell them. Otherwise look up Torqueflite Patty.... I think that he had them too. but if you do decide to do something different, put me next in line for that adapter. |
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| Author: | slantzilla [ Wed Sep 22, 2021 3:35 pm ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Unless you change the trans, you will need the plate and the extension that goes on the crank hub. IIRC, they made an adapter for the large pilot crank, but it will also be for a large pilot converter. The reducer ring should work for that part. You might need to change oil pans too. |
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| Author: | a100gary [ Wed Sep 22, 2021 4:22 pm ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Wow. Really impressed with the response here! An A100 supports the transmission from above with a cradle type of setup, there is no crossmember. The other two attachments are the left and right motor mounts. What came out of the truck was a 1965 slant six 225, with adapter and crank extension. What is going into the truck is a 1976 225, no adapter needed. If you measure from the back of the engine to the motor mounts, the '76 engine is 17 1/8" to the motor mount holes. The '65 measures 17 1/8" plus the 1 1/8" thickness of the adapter. This is what is the current setup is (18 1/4"). To install the '76 engine in the truck the motor mounts will be 1 1/8" too long. I don't think the cradle is movable, how about the motor mounts??? Thanks everybody!! Is there an answer I don't know about? If the 65 is junk I will have an adapter and crank extension up for sale. But now, it is a requirement for that 65 engine. As always thanks for your help!! Gary |
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| Author: | slantzilla [ Wed Sep 22, 2021 5:00 pm ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Are you using a 76 engine and trasmission? |
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| Author: | DusterIdiot [ Wed Sep 22, 2021 5:25 pm ] |
| Post subject: | D |
D |
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| Author: | Doctor Dodge [ Wed Sep 22, 2021 10:29 pm ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
You have a "stock" 65 van with a bad 225 SL6 engine and the original 727 transmission, that uses the adapter plate. You also have a "good" 76 SL6 engine that you want to install into the van. So you need to pull out the 65 engine along with the adapter plate, crank extension and flex plate. Swap all the vans engine mounts, accessories and special parts onto the 76 engine, including the oil pan, the pan's oil pick-up tube and the special adapter plate / crank extension / flex plate that came out of the 65 van... But... The 65's crank extension /spacer will not fit onto the 76 crank's pilot hub because the shoulder is larger. You will have to get the correct crank extension / spacer (68 and later) or have a machine shop open-up the counter bore in the spacer you have so it fits onto the 76 crank. Once all the needed 65 parts are swapped onto the 76 engine, install the replacement engine into the van and fire it up. DD |
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| Author: | Charrlie_S [ Thu Sep 23, 2021 4:08 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Quote: But...
Is this correct? Won't the crank spacer nub be to small for the 76 crank, and require a bushing in the crank pilot hole . Or does the crank spacer fit over the the crank flange (like a flexplate), and not into the pilot hole?
The 65's crank extension /spacer will not fit onto the 76 crank's pilot hub because the shoulder is larger. You will have to get the correct crank extension / spacer (68 and later) or have a machine shop open-up the counter bore in the spacer you have so it fits onto the 76 crank. |
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| Author: | Badvert65 [ Thu Sep 23, 2021 5:20 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
FYI, I believe the 65 A100 transmission would be the 'cable shift' style, so that pretty much means he'll have to keep his current transmission. jus sayin..... |
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| Author: | Greg Ondayko [ Thu Sep 23, 2021 6:43 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Unless you swapped it to be a cable shiftin' the never Style case valve body - like a race car. that seems feasible to me. but yes to keep the oe style stuff you are correct. Greg |
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| Author: | slantzilla [ Thu Sep 23, 2021 8:56 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Quote: Quote: But...
Is this correct? Won't the crank spacer nub be to small for the 76 crank, and require a bushing in the crank pilot hole . Or does the crank spacer fit over the the crank flange (like a flexplate), and not into the pilot hole?The 65's crank extension /spacer will not fit onto the 76 crank's pilot hub because the shoulder is larger. You will have to get the correct crank extension / spacer (68 and later) or have a machine shop open-up the counter bore in the spacer you have so it fits onto the 76 crank. 
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| Author: | Charrlie_S [ Thu Sep 23, 2021 9:28 am ] |
| Post subject: | Re: Engine swap w/ and w/o adapter plate |
Quote: Quote: Quote: But...
Is this correct? Won't the crank spacer nub be to small for the 76 crank, and require a bushing in the crank pilot hole . Or does the crank spacer fit over the the crank flange (like a flexplate), and not into the pilot hole?The 65's crank extension /spacer will not fit onto the 76 crank's pilot hub because the shoulder is larger. You will have to get the correct crank extension / spacer (68 and later) or have a machine shop open-up the counter bore in the spacer you have so it fits onto the 76 crank. |
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