Close to original---------you can get a 460 crankshaft-------custom pistons built for a chev wrist pin and have your rod small ends bushed to the chev size--performance valve job with smoothing of the area just under the valve head and leading to the guide area---------those heads (1970) were still the high compression era so a lite dusting on a surface grinder to refresh the gasket surface-------deck the block square and equal----alighn hone mains----balance-------intake manifold for the rpm range you want to run (not an extreme type for 8000 Rs) early timing gear set because a couple years later they retarded the cam 8 degrees---ignition /distributor---if you run the 1970 points system ford dist you can put in a 10 degree advance plate and convert to dual points wired separately thru a toggle switch for a cheap advance/retard system---plan on at least an 850-950 double pumper carb---------


If you can find some extra funds there are aluminam heads and stroker cranks out there but a stroker and alum heads will add 4-4500 to cost----------