Junk yards are full of them
Parts you can get from Ford Power Parts out here in calif ... they have it all. Also don't forget the 352 390 406 and 427 are the same basic motor different bore and/or stroke.
Get the police interceptor rods (best of the budget rods)
Get a 427 crank (same stroke as a 390)
Most of the factory heads are close to the same except the old 427 high riser heads or tunnel port heads
Most important of all is don't let anybody talk you out of making the oil galley modification (restricting the oil passages to the lifter bores) otherwise you get past about 6500 to 6800 RPM and you'll burn the # 7 or # 8 rod bearings or the rear main. It starves for oil without the mod. Don't let anybody talk you out of doing it !!! My brother has been building FE's since their introduction in 1958 i've been around them since i was a kid, so i'll answer anything i can that i've picked up along the way... which with my feble brain ain't much
