I know what I'm going buy an intake and heads. My question is what would it be worth to go to long tubes vs stock manifolds? Currently I have an OR H and flowmasters. How much would long tubes help with the heads and intake with cam later to come?

 

quite a bit, the stock headers are seriously pinched at all the turns and suck with stock heads and intake

 

Yeah. Stock manifolds leave a lot on the table, and the gains with intake and heads are even greater.