Let's say I have a 1978 Pontiac 400 but no carburetor, and I take a 1978 Buick 350 Q-jet and build it to the 400's specs. Would I use the Buick's 7/32" float level that is spec'd for that carb number, or would I use the 17/32" float level spec'd for the 400? They are not even close so it is a big decision. What I noticed right off is that at the 17/32" there was not enough fuel in bowl for the accelerator pump. I raised it up to 12/32" and got a decent pump shot but still have a crummy idle. It wants more fuel. So right now I have it apart looking for dirt in the idle passages and found some. But then re-assembling it I realized that the 7/32" is even higher than the 1/4" I usually use on all my Pontiacs. So I set it at 7/32" and I will test as soon as the remains of Florence get done with us. So what is the proper procedure? The float level of the carb or the current application?