Another Conversion

[r.e.c.enthusiasts]

when I pulled the first one, the base shaft and gear was appx 1/4 too wide to even fit into the dizzy which is why I ask... on another note. currently it has a new map and a new iac v. it started up immiadiatly after sitting for a few hours but stayed at 500 rpm's. ill pull the cover off the ecu to see what it has.

[1project2many]

It sounds like the combintaion may be getting too much fuel. The injectors and calibration should be from a similarly sized engine.

Without the timing control you're missing half the benefit of an ecm. What year 250 do you have? Are you using a GM HEI or aftermarket? Could you install a 7 pin ESC module instead of the 4 pin version?

[r.e.c.enthusiasts]

The donor vehicle was the 1991 chevy astro van 4.3l V6 for the ecu tbi harness sensors. my dizzy is a big cap GM HEI also pulled from another car years ago and it works a LOT better than the old points it had on there. and the 250 I believe is from a early 75 chevy nova (non intergral head)

[dave w]

The CALIFORNIA EMISSION vehicles listed below with a 4.1 / 250 engine should have the 7 pin HEI / WITHOUT VACUUM ADVANCE distributor. AC Delco part # 88864755 or A1 Cardone part # 30-1677 ( https://www.summitracing.com/parts/aaz-30-1677 ).

dave w


CHEVROLET C10 PICKUP 1983-1984
CHEVROLET C20 PICKUP 1983-1986
CHEVROLET C30 PICKUP 1985-1986
CHEVROLET C50 1985-1986
CHEVROLET C60 1985-1986
CHEVROLET G10 1983-1984
CHEVROLET G20 1983-1984
CHEVROLET G30 1983-1984
CHEVROLET K10 PICKUP 1983-1984
CHEVROLET K20 PICKUP 1985-1986
CHEVROLET K30 PICKUP 1985-1986
CHEVROLET P20 1985-1986
CHEVROLET P30 1985-1986
CHEVROLET P40 1985-1986
GMC C1500 PICKUP 1983-1984
GMC C2500 PICKUP 1983-1986
GMC C3500 PICKUP 1985-1986
GMC C5000 1985-1986
GMC C6000 1985-1986
GMC G1500 1983-1984
GMC G2500 1983-1984
GMC G3500 1983-1984
GMC K1500 PICKUP 1983-1984
GMC K2500 PICKUP 1985-1986
GMC K3500 1985-1986
GMC P2500 1985-1986
GMC P3500 1985-1986
GMC P4500 1985-1986

[r.e.c.enthusiasts]

Okay. So ive searched a boat load for that distributor... With one on back order to no end... Does any body have a suggestion of a used one i could buy or a place to send mine to be re designed to work properly?

[dave w]

Okay. So ive searched a boat load for that distributor... With one on back order to no end... Does any body have a suggestion of a used one i could buy or a place to send mine to be re designed to work properly?

I was able to locate and purchase a used 1983 / 84 C-10 I-6 HEI distributor (without vacuum advance) from a CALIFORNIA salvage yard.

dave w

[Eds]

I just looked at RockAuto and they show the AC Delco unit p/n 88864755 available.

http://www.rockauto.com/en/catalog/c...stributor,7108

[r.e.c.enthusiasts]

When/where. Ive searched pnp rancho, sacramento, roseville. To no avail