[scottj]

Richard,

What you recommend is a very popular combination in dirt Late Model right now. It has the right amount of torque to get off the corner without blowing the tires off like the 434's will. The big motors need to have gear taken out so they hook up and then they don't have the acceleration on the straights. The 380's can use allot more gear and with an ultra-light rotating assembly, out accelerate the bigger motors once traction goes away. The ONLY reason I run 434's is because early in the night, when the track is hooked-up, they qualify better.
In dirt Late Model tune the 380 turns 5000-9000 rpm, 15:1 comp. 1.75:1 rod ratio, and makes about 800hp and 650ft/lbs.
If I was going to build anouther Cobra motor it would be a detuned 380.
Scott