GRRREAT posts! 5 years later.... what was the answer Harold?
Also, Vikki: You mentioned the date code on the engine being later than the car build date. I'd like to check mine. Is it a Julian code I'm looking for? Here's a couple numbers I found I cant ID. Thinking I'm on to something?
'68 400HO Coupe, 4 spd, 259 interior, Windward Blue. My other car's a Johnson 15 outboard on a '61 Starcraft rowboat... Just sayin'.