Recently installed Patriot LS6 heads with 59cc chambers 2.055 1.57, t-rex cam, 7.450 comp pushrods, Harland Sharps 1.7, Comp Pro Mag lifters. Having problems with valve covers and rockers tapping. Is it my pushrod length?
Also installed a ported FAST 90 with a Lingenfelter 90mm TB. Currently using a stock MAF. 97 Corvette is running lean. Cannot tune with these issues. Can anyone help me? I am new to this! Thanks!

 

Could be the rockers hitting the baffles or the cover.

There is a 0.5" shim that you can get from Jeg's you might want to check out.

That is after you take out the baffles and grind the crap out of everything in the way and they still hit.