the rocker arms and pushrods im looking at are COMP Cams Magnum Steel Roller Tip Rocker Arms
rocker Arms, Stud Mount, Roller Tip, Steel, 1.6 Ratio, Fits 3/8 in. Stud self-aligning

Pushrods, High Energy, Steel, 3/8 in. Diameter, 8.280/9.252 in.

but i need to know if they will fit my heads are stock my engine is bored .60 over the cam a lunati voodoo cam with low duration something like 211-219 with 503-525 lift the springs are lunati behive springs and can match the cam
i dnt know if this info helps at all
and i also dnt know the stock size of pushrods and rocker arms any help will be appreciated

 

Stock pushrod length is 7.200". If there was no head milling or block decking, they should work. Otherwise measure. If you are only considering roller tipped rockers (I'd spend the extra for full rollers), then those will fit.

 

i did have the heads resurfaced i cant seam to find 1.6 ratio in a shorter length
and if i do should i go the stock length im thinking of the full rollers but these were self-aligning thanks

 

Spend the extra money for the Pro Mags.

 

OEMs went roller fulcrum but not tip, that should suggest to you something about where there are gains to be had.

 

im srry but i dnt really understand what this sentence is saying could u mabey dumb it down a little for me

 

He's saying that the roller tips don't help nearly as much as the roller fulcrums, so it'd be wiser to spend your money on a full roller rocker.

 

oh ok thanx

 

ok so im running into pushrod problems i cant figure out what size i need and i dnt know how to figure out what size i need i want something like 3/8 stud
would the diameter , and length of the pushrod matter if it helps i dnt know the type of heads i think stock lt1 heads but i have resurfaced them but it does not look like i will be able to do it again so i dnt wan to get too long or short of push rods if the length matters if some one could tell me how to check that would be awesome
and tell me if the diameter of the rods match ?
i looked at some that was 5/8 but the stud was 3/8 i believe, are all push rods one length and the stud is another ?
srry and thanx for any help

 

The rocker stud and pushrod are two separate matters. Stock rocker studs are 3/8" on the top and 7/16" going into the head. Some people upgrade to 7/16" on both ends for strength. Your rocker arms would have to be for 7/16" studs if you were to use that size stud.

Stock pushrod diameter is 5/16", length 7.200". Some people use 3/8" diameter pushrods for strength. The length is critical for proper rocker arm geometry. Read this article to see how length is determined.