People try and cheap out on the most important stuff. Why buy a cheap cast crank?
Wait and get good stuff and do it right the first time. Its great advice scottb gave.
Billy is absolutely correct

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8