360 help

I didn't want to get into the cam, I just wanted to put the rockers on top of the cam I have now. Talked crane and they said it would add 30lift and about 4 duration.Puts it real close to a XE262H specss with alot less work. I'm just wondering if theres a down side.

Sorry, i thought you were talking both :D. Performance wise, i don't see a huge gain, but any will surely help. One possible problem that i've seen some members have here is the pushrods hitting the pass thru hole in the head when 1.6 rockers are used. If that's the case, they would have to be machined larger for clearance.

Here's what i'm talking about in this link........http://www.moparmusclemagazine.com/...01_mopar_performance_valvetrain/photo_15.html