Looking for any and all input.
I recently purchased a 1973 CV21 to restore. It has a newer Berkeley jet pump, but no engine. The first two paths engine replacement could take are both in the same 300-350 hp range:
1.) Replace it with an early 70's vintage Olds 455 big block like original. Would at least start with a marine engine, possibly a non-runner for complete rebuild, or something more together. I'm pretty certain I would use a Holly Sniper EFI fuel system and an HEI distributor, but otherwise pretty old school. Would integrate into the electrical system, gauges, etc. like the original.
2.) Replace it with a 2000's Mercruiser 6.2L engine. Might be something needing repair, or drop in ready. Would have modern ignition, fuel injection, but no doubt present some challenges integrating it into the original dash and controls. Might be a few $1000 more than the Olds, but worth it to have the later technology?
So when thinking about reliability, driveability, sensory, fun, resale, servicing, what would be your vote? I know fuel economy will favor the newer engine, but Michigan summers are pretty short and I don't get to put that many hours on my boats, so that takes a backseat to the other factors. Or am I missing some things to consider?
A third possibility would be a modern big block, like a 2000's Mercruiser or Volvo Penta 8.1L, which would be 375-400 horsepower and another few $1000 more....but would that be worth it? Would the extra HP really result in a better boat?
Thanks for you thoughts.....option 1, 2, or 3?