Dan Comoss
PCS Member
I have been fighting carburetors since I got my coach. I received the car with a 600 Edelbrock. Transmission and anti dieseling switches were not hooked up. Nowhere to attach them to the carb.
I had my mechanic find two quadrajet, one from a 75 caddy, one from a late 70's Chevy pickup. We rebuilt both of them but neither of them ran correctly. Wanting to die at low rpm and kickdown, and anti dieseling did not match up either.
I put the Edelbrock back on, purchased an adapter plate with the 4 port rather than one big open port. I managed to get it to idle and run. Still no kickdown, still in the process of tinkering with the choke. So far the only issue I have is after it's hot and sits it does not want to start easily. If I hold the petal to the floor it will fire up then sputter and choke until it clears itself out. With some reading this seems to be a common issue with Edelbrocks.
I did come across a 72 Cadillac quadrajet that was rebuilt by Autoline. It's still in the plastic wrap and box. It's $450 which seems a bit pricy, but the numbers on the carb do match for a Cadillac qj.
I was also pondering a new Holley spreadboar since it would bolt directly to the intake without a spacer.
I'm leaning toward the QJ since it would be keeping everything original. The new Holley is similar in price. What does everyone think the best option would be? Is there another option that may be better than those two?
I had my mechanic find two quadrajet, one from a 75 caddy, one from a late 70's Chevy pickup. We rebuilt both of them but neither of them ran correctly. Wanting to die at low rpm and kickdown, and anti dieseling did not match up either.
I put the Edelbrock back on, purchased an adapter plate with the 4 port rather than one big open port. I managed to get it to idle and run. Still no kickdown, still in the process of tinkering with the choke. So far the only issue I have is after it's hot and sits it does not want to start easily. If I hold the petal to the floor it will fire up then sputter and choke until it clears itself out. With some reading this seems to be a common issue with Edelbrocks.
I did come across a 72 Cadillac quadrajet that was rebuilt by Autoline. It's still in the plastic wrap and box. It's $450 which seems a bit pricy, but the numbers on the carb do match for a Cadillac qj.
I was also pondering a new Holley spreadboar since it would bolt directly to the intake without a spacer.
I'm leaning toward the QJ since it would be keeping everything original. The new Holley is similar in price. What does everyone think the best option would be? Is there another option that may be better than those two?