[recnepswilliams]

i took the valve covers off of my car to tighten my rockers (which sounded loose) and i noticed that when i try to loosen the rocker the whole rocker stud turned.

they are stock 305 601 heads and they are on a 350 block. should i just install new rocker studs in these, or will i see a large gain in performance from switching to 350 heads? possibly aftermarket? if so, what are some good cylinder heads for all around power and efficiency?

[DoubleVision]

For the power and dollar, it`s hard to beat RHS Vortec heads for street use. They will kick up the power and really surprise you. You will need a Vortec intake to go along with it.

[Bad Influence Racing]

If the budget is thereI would switch to an aftermarket alum head. You can run a bit more compression and stay with 93 octane and will make more power and trque. Main difference bewteen the 305 and 350 heads is the chamber size. The 305's are usually smaller. No big power difference bwteen stock heads though. Which head I go with depends on budget. I would also upgrade camshaft for the new compression and cylinder head.

Kris