Check around on Coast High - have seen a bunch of posts lately about getting screwed there. for the Ford 393 crank check
www.oemfordparts.com, their svo section. also for the hypereutectic pistons they use in their stroker crate motor. for good discounts on gen Ford parts, check
www.fordpartsnetwork.com, have had good luck with them. For rods, do a search for like Eagle, Scat, crower, etc. Then stick on some TW R or AFR 185 heads and go for it!