The Stovebolt Site Forums The Shop Area The Electrical Bay Point type distributor

Anyone have a reference list for GM point distributors? I put a 283 engine in my 66 Chevy C10. It was in the bed of an old truck I bought for parts. It runs good but sputters and pops when about half acceleration. I had a 70 C10 years ago with a th350 trans. that only got tming advance in high gear and would do the same thing with the advance unit bypassed. This 66 C10 does much better if I disconnect the advance. It is running a three speed stick shift. The distributor in the engine now is #1111257. I have three other distributors I could use - #s 1112047, 1112846 and 1111150. They could all be for the same set-up for all I know. Anyone have any ideas? Reference lists?

Thanks, Truck Tinker

Some engines will surge like that when there is too muck spark advance. Maybe your initial timing is set too high. You can get an adjustable vacuum advance & set it up to limit the vacuum advance.

I checked a few of my factory shop manuals and the #1111150 shows good for a 1966 283 4 degrees BTDC, Vac 0@8, [email protected], centrifugal, 0@900, 7@1200, 16@2000, 28@4400,interesting it also shows for a 1968 396, but different vac and centrifugal. The one that's in it shows in my 1968 manual as a 307 Distributor Vac is 0@6, 15@12, centrifugal is 0@1000, 10@1600, 28@4300.

I'd go with the #1111150 even the 396 would be closer than 307. The 1967 Chiltons didn't have the other two numbers, so I'm thinking they would be even later with spec.s close to the 307. You should be able to check the centrifugal advance with a timing light and tach.

Larry