I doubt you would have suggested for me to check this if it wasn't a possibility but how could it create a shudder symptom

The kickdown linkage also controls the line pressure in the transmision and if the linkage is misadjusted it can cause the transmission to behave erratically and fail prematurely. The line pressure dictates when the engine shifts as well as (if I understand correctly- I am not a trained transmission tech) how firmly the clutches and bands are applied. I am not 100% certain that a misadusted kickdown linkage will cause transmission shuddering, but it is something worth checking out.

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Casually looking for a Clifford hyperpak intake for cheap.

Thank you all, I'll keep you posted.

Incorrect ki ck down can cause a shudder in clutches by allowing theme to slip since line pressure is low like if kick down is not attached or setup bad. But not a converter shudder it's apply command is by 1 Trans has to be in 3rd gear and then by Governor pressure wich is speed. It's apply oil pressure is controlled by another valve and is fixed

I'm back to thinking is an ignition issue because I loaded it up with the trailer and I climbed a hill with it and it did it in second gear. I can hear the engine much better now on this hill running at 25 miles an hour in second gear and I could hear the motor missing which I could never hear before without this trailer behind me. Since it's points I'm gonna check the dwell tonight and post my results. It's funny with these old ignitions because you can never take anything for granted.

Electronic ignition is do much better than points and so easy to install that you should just do it.

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Casually looking for a Clifford hyperpak intake for cheap.

Well folks, I want you guys to vote me as the dumbest guy on this board. It was the points! Just came back from a 30 mile run with many hills and the old D150 had not a shake or shudder. The distributer cam is worn more than I'd like. One lob point gap was less than .010, 2 others around .013 so I set the lowest one at .020 and bam, fixed.

Next is a HEI set up like Reed suggested. I see some OEM distributors new old stock on the bay do I may snap one up or just go to the bone yard and pull the necessary parts.

Thanks again, today was a good day. You guys rock!

Given the way things are now...

I would try to get an NOS one from Old Car Parts NW first...

Some "dealers" on Ebag have reman distrbutors listed as NOS and they are not...

If you get one from the junkyard you will have to pull it apart and replace all of the following: gear, vaccuum advance, pickup.... that can be about $40-50 of new parts over the counter...so it may not be worth the junkyard price (most junkyards now look at ebag and price cores at about $50 each...then you have to clean lube, and replace the parts)

Worst case scenario is to order an Autoline reman from RockAuto D-619, they are a bit better quality than A-1 Cardone.... (look it up as a distributor for a 1978 Dodge Aspen)...you will have to pull the pick up and inspect the governor to see what you really have....

The two I see on eBay are from old car parts nw. I think I'm gonna click the bin.

Part number 3874082 is for a 1975 A-body and is not desired for this style of conversion (it's not too different than the 1973-1974 distributors...

You may need to call them and see if they have one of the 1976 distributors (714 or 598 as the last 3 digits)...

looks like you saved the day. I called them and he had a 714 so that's getting shipped today. Thanks brother!