Just picked up a 69 Cuda...

You dont want to flip the 340 if its #s matching....just bench store the block and heads and save the extra grand yu need.

Gen 3 will bolt straight up to your 727 with the flex plate and bellhousing shim from MP.

If you run a kickdwn there'll be some extra $$ required with EFI.

Make sure your trans is healthy to take the xtra tq of the Hemi.