What intake to look for??? Stock 360 crate motor

Agree that the intake size is not the problem. I had an LD4B small port intake on my 340. Ran fine. Replaced it with an RPM Air Gap and there is more top end, but my butt dyno says there was a little more torque at the lower part of the range with the LD4B. I you just have to change the intake, I'd go with a $50 CI intake off a 340. Will flow more than enough air and leaves a big pile of cash to spend elsewhere.