In theory they should work just fine on your application, however, Each engine can vary from the next so the only way to be 100% sure is to check the pattern that they leave on the valve spring. You can do this by putting a layer of assembly lube on the top of the valve stem that stick through the retainer. Bolt down the rocker arm and rotate the engine over. Take the rocker back off and look to see where the roller came into contact with the valve stem. It should be directly in the middle if it has the proper geometry. if it is offset, then you would need to look into shims to correct it.
Answered by Scott G. from hewitt | Comment 0 0
I have the GT40P heads and opting to keep my stock cam in the 5.0 explorer V8. Will I need to upgrade the valve springs as well with these 1.7 roller rockers or will the stock springs work just fine? Thanks
Asked by Christopher V. from Litchfield Park | Comment 0 0
You'd want to upgrade the springs. The stock springs were barely adequate for the stock cam and 1.6 rockers. Adding the 1.7 roller rockers could cause valve float at relatively low RPM. The TFS-2500100 would be a great option for you.
Answered by Jonathan M. from Hewitt | Comment 0 0
we took 1968 hi-po heads and got them machined... anyways we have a roller cam and are not sure which rocker arms would work properly... the stock heads had the roller rocker channel kit we just aren't sure exactly where to go now as the rest of the motor is done.
Asked by travis c. from salmon arm | Comment 0 0
Travis, if you are using 1960's 289-302 heads and are converting to screw in studs you will need stud mounted roller rockers such as TFS-51400510.
Answered by Tommy E. from Hewitt | Comment 0 0
Using these with a B cam will effectively raise the lift to .510, so yes you can run these with them. You'll need to ensure your valve springs are up to the task and also check piston to valve clearance.
Answered by Karson S. from Hewitt | Comment 0 0
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