NEVER put a 750 on a 318........

Jarlaxle said
Mopar put 800cfm carbs on 150hp smogger 318s. GM put 750cfm carbs on 4.3 and 4.1 litre V6 engines, in heavy cars with tall gears!

I drove a truck with a 750cfm carb on a 370ci engine that never topped 3500RPM.
Click to expand...
What RRR said is what I was about to say.
The QJ & TQ having a small primary is very helpful on any engine, smogger or HP engine. The engine will just swallow what ever it needs going slow or @ W.O.T.