Thank you. that solves that. I'll keep looking for a regular old big block 727.
I put a good 5 hours into it tonight - pulled the small block 727 - pulled the radiator, driverline (found its got the 9 on the rear axle so its a 489, but no posi) Pulled the old heater hoses, wiper motor, moved the wiring in prep for painting the engine compartment -