1525
« on: December 04, 2006, 01:32:49 AM »
Bertfam,
You are right regarding what carb dates work for the vehicle. Carbs were installed at the assembly plant so the build date of the car is what is paramount. I might add when buying an original carb, make sure it has the correct original base plate and metering blocks. Over the years, many original dated carbs seem to have the thicker replacement base and changed metering blocks. Very easy to tell. In the driver's side rear corner area, the plate is a lot thicker. Originals have very thin webbing in that area. Most of the common Chevrolet Holleys use a 5583 front block and 4519 rear. And by all means, go for the original carb, your car will have more value in the long run. The new Holleys have the replacement base plate and hex head float bowl screws making them quite a bit different than the originals.
Jerry@CHP