K member swap
use the schumacker mounts . a slant 6 k-frame is strong as a bigblock k-frame, there isnt any strength difference, when ya call schumacker ask them. measure the torsion bars first as the slant 6 tbars will give the front end good rise if you race it, Ive seen factory slant 6 t bars that were thicker than bigblock cars frrom the factory, the rules in racing is use the slant 6 torsion bar for small blocks and the smallblock torsion bar to a bigblock.