valve shim help......

[85GT2NV]

hey all, i was changing the seals on my gt40p's and noticed my spring shims were kind of sharp and worn. i used the trick flow valve spring upgrade kit from summit. i figure i better change these out real soon before bad stuff goes down. can anyone reccomend a tough shim, and also what size i.d. and o.d. shim will i need ? thanks fellas............

[306gt]

Go down to your local machine shop,they should have V.S.I. valve spring shims. V.S.I. makes the shims. They also make hardened shims for performance applications. For the small block Fords the part numbers are A103-.060, B103-.030, C103-.015. The hardened shims will have the same part number but add a H.P. At the end of the number. The hardened shims will come blue in color.

[FoxChassis]

Each spring needs to be tested to figure out which shim is required for it. Without doing that you will never know if you have the right seat pressure. Here is one such machine/tool used for testing:

[85GT2NV]

ok thanks, i have a spring height gauge, that wasnt my question.