'66 Valiant restoration general help

I have not done the six to eight swap myself but others here have. You do NOT need to change the k-member but do need the V-8 mounts and center steering link. A V-8 radiator is required and also front torsion bars to support the increased weight of the V-8 is probably a good idea too. The small bolt pattern Kelsey-Hayes disc brakes are available. I like the idea of aluminum heads just paint them red like an original engine or paint them with "cast iron" spray paint.