Cannot decide on project direction 73 Duster 340

My Son new member DenverMopar recently bought a slant 6 (1974 Duster) and I told him to build it how he wants it to be. In three weeks he bought a 340, 8 cylinder K member, floor pan, dash pad, manual steering shaft, seats that need redone, some body parts, a rebuilt 904, and a few other items. Now if it was a super clean 340 powered 1970-72 Duster I would probably say to put the cutting torch down.