i'm building a vortec headed 383 with semi siamesed slp runners. i bought the pro topline heads bare and need some input on what kind of work i should get done to the heads. i've read before that the exhaust ports need some work? should i have a 1.6 exhaust valves installed and keep 1.94 on intake, or go to 2.02 there too? another thing i bought them with 64 cc chambers, can the vortecs be milled to say 60 or 62 cc to bump the compression up a little?

plus how do you think the xe274 cam kit from jegs sounds? think that cam is too big, not enough or good? anyone know how the springs are that come with the kit, like what max lift it supports?

any help would be great. thanks.

Jason

 

Kinda lost me on that post....Which heads are you putting on it? The Vortecs or the ProToplines???? Either head should have some exhaust porting done to it. SBC's love that.....As far as the cam, it shouldnt be too big being that its going into a 383, just make sure it will work well with the TPI. Id go with the larger valves for the 383. It will need more air than a 350 does......

 

sorry bout that, i bought the protoplines vortec style