something is way out of wack here.if ur front tires are leaving black marks
take ur foot off the brakes. what kinda 60ft times what is the mph. 15 is a pretty short tire.as far as that pinto goes,WOW, hell of a 455. that Datsun rear suspension may not be suited for drag racing. in the early 60's they put
regular rearends in Corvettes for drag racing purposes. the irs never worked,the rear wheels would toe in really bad with big horsepower