I HAVE SEEN BUILT UP 258'S. THE ONE I SAW WAS BACK IN THE LATE 70'S IT HAD EVERY THING PISTONS, CAM 4BLE HEADERS MAN THAT MOTOR WOULD JUST SCREAM. BUT A CHEVY MOTOR IS ABOUT THE CHEAPEST WAY TO GO . THEY MAKE GOOD HORSE POWER FOR FEWER BUCKS. WHAT TRANS WILL YOU USE WITH THAT COMBO. (AMC &CHEVY) HOWARD [Non-text portions of this message have been removed]