Well, Nacho, I did say, " You may be able to advance the cam, which closes the intake valve sooner, which can cut down somewhat on the choppy idle." a while ago on the page.

This poor guy spent a lot of money on this engine and expected it to run right out of the box. That's what a crate engine from a specialty shop is supposed to do. Muscle Motors' reluctance to give the specs on their camshaft is understandable if they spent money to develop it, but now that a customer is having trouble with it, they should pitch in and help.

OP, have you talked to MM about your situation?

R.