I built a low deck pump gas 400 stroker(511 C.I.) low compression six pack motor to race the black guys on the streets in Los Angles, I put it in a 1971 Duster that ended up weighing 3450 Lbs. with me in it and it ran 10.30s with the air cleaners on (stack two elements on top of each other ) through the full 3.0 inch exhaust hooked up exiting at the rear bumper It was fun
Six packs rule But their not the fastest combination out there