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Hi Doc,
I am running the Scat 4.125 Cast crank with the 6.535 Scat H-Beam rods in my 67 Mustang Drag car. The motor has Ross flat top pistons that create about 11.6 to 1 compression. The motor has right around 698 HP and runs 10.50s in a #3300 car. I'm getting about 128 mph in the 1/4,with 3 races so far. This is a little early to know about how reliable the parts are, but so far they seem to be working great. The motor spins up to 7500 effortlessly. Unbelievably really, like a small block.
With your TP heads, in a street Cobra, I would go with the 4.25 stroker, your heads will love the extra flow potential!!!
Good Luck, Tom.
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Tom Lucas, FE Specialties Sacramento, Calif. 916-339-0427. Our Engines are designed and engineered, not just thrown together. I design engines for every application. From mild street engines for torque to mid type performance engines for Cobras and Mustangs too fullout Race engines for Nascar and NHRA.
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