There is no off-the-shelf/replaceable throttle bushing in any carb used as factory equipment on the Slant-6. If there's side slop in the throttle shaft-to-throttle-body junction, you need to have it rebushed. See here.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I just got quoted $110 to rebush a Holley 6145....ridiculous. Paid $40 for my BBD a few years ago.

Ray.
If you can afford it try the HEI upgrade,you won't be disappointed.
I have done this on my 65 AP6 and i am getting between 10 > 12 kms a litre.
Yes,i have done tests with my odometer from full tank to full tank.
I have also done tests with maps to calculate the distance.
Both seem to be pretty much the same.
What carby are you running ?
If it is a single barrel,you could try fitting a 2 barrel carb,you will find you will get better fuel economy.
I had fitted a 2 barrel to my VF Coupe i used to have,better fuel economy.
I have fitted a 2 barrel to my AP6 and done the HEI upgrade,better fuel economy.
There is lots of info on here about the HEI upgrade,or here is my link.
http://www.moparmarketforum.com/forum/v ... 57&t=22121
Cheers,
Greg

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DRIVE IT,DON'T HIDE IT

I also have used both grades of our Australian fuel in my APE,doesn't seem to make a difference.

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DRIVE IT,DON'T HIDE IT

H Greg, It Currently has the original Carter carby on it, I put a kit thru it but I think it is just too worn out, am going to go thru and double check the timing etc as per Dans instructions, but i;m 99% sure that is all good. We do Have a 250 holley that was on the car when we bought it but it was badly mounted, leaked fule, idle jets were loose and was missing a few bits, Had a home made adapter plate that leaked as well, maybe i should get a rebuild kit for it, and mount properly. RAY