[Phantom16]

Any difference besides looks? I just received a set of the GM Performance covers in the mail and they're significantly shorter than the ones I have on my 454 in my 68.. Any difference or anything I should worry about swapping out tall for short? Thanks folks.

 

[proex339]

Could be an issue with clearance pending what kinda rockers etc.

 

[Phantom16]

Not sure (dumb I know). Bought the car with the built 454 and got her right off into the body/paint shop. I imagine I'll find out soon enough if the covers clear the existing rockers.. Thanks for the comment though. RJ

 

[72LS3Z27]

Short covers can interfere with aftermarket rockers sometimes.
Tall valve covers can hit the brake boosters on some models.
Which one works for you?

 

[blumont]

short look better

 

[Phantom16]

Tall on her now.. Doesn't mess with brake setup. Hoping the cooler Chev Perf 454 covers aren't too short for the existing rockers (again, dumb I know, but not sure what's under the existing covers)..

 

[Raymond]

Plenty of discussion on this forum about your concerns. You will see double gaskets being used and/or shorter rocker locknuts to remedy the problem if there is one.

 

[Hi-po SS 454]

Taller look better.

 

[Tomatolane]

If you ever are going to run a stud girdle , you will need tall valve covers.I know my stock aluminum GM valve covers where 1/2 inch to short for my scorpion rockers,

But if I got shorter lock nuts and maybe a real thick valve cover gasket, they might fit.

I went with fabricated aluminum ones.

 

[Indiansprings]

How about the best of both worlds. The taller slant covers from Ground Up is what I'm going with.