Choosing CFM carb - '72 Pontiac Lemans
My engine is the stock 400 cu in 6.6L, I don't
know if this is enough info to determine an
answers so if not ask what you need to know
because I really wanna figure this out
So I'm going to assume you have a Quadrajet on it now, and you want to change it, Edlebrock makes a nice replacement carb for that engine and you can custom tune it by changing the rods or the jets, if your leaning to more performance types there is Holly carbs, they have a choice from vacuum secondaries to double pump accelerator style, a little more work to customize it but still very good performance carbs. Now if you really wanting full custom adjustability and money is no object you can install an electronic fuel injection system. I personally like the Edlebrock carbs for GM and Chrysler V8's, but that is just purely preference of one person. If still feel uncertain talk with your local speed shop or an old school parts counterman they can steer you to where you want too with this engine. HTH
This engine can easily handle at 700. CFM.
You can also call these guys to figure out what you need, so happens I have Holley's number, 270-781-9741.
Looking for a Used Le Mans in your area?
CarGurus has 19 nationwide Le Mans listings and the tools to find you a great deal.
Search Pontiac Le Mans Questions
Pontiac Le Mans Experts