"I have a 408 built by IMM engines. I currently have a port-matched LD4B on it and am making 523 hp @ 6000 rpm and 522 ft-lbs @ 4500 rpm on their engine dyno. I'm planning on installing a Holley Sniper on the car (hopefully before next spring, not sure if I'll upgrade to a Holley EFI Dual-Sync distributor). Is it worth it to replace the LD4B for a Mopar M1 intake (no port work done)? I figure the intake is a big restriction as the LD4B was meant for 273/318's. But how much of a hp/tq increase do you think I'd get? Do you think it will ruin the driveability with the EFI?"
Why not ask Brian what he thinks?
