I've been doing an engine swap.
Going from a inline 6 with a 3 speed manual to a 350 engine & TH350 trans.
See my avitar.
All I got to do to fire it up is:
trans cooler lines,
trans vacumm line,
exhaust,
hook up the battery terminals,
then fire that 350.
I know my truck is not a '67-'72, but the engine I dropped in is a '72 350.
Tomorrow i'm finishing her up (hopefully), i'm getting those not driving my truck withdrawls.
David