I have a C5ae-a 391 FT no bosses.

Sorry, Urgefor, I hit the wrong Quote Icon.

I meant to ask 63ragtop about the '65 FT 391, block.

So the caps are being machined at Straightline Machine LLC right now. Just did a test fit of the first cap off the machine on a stock 330 MD block I got here . How much material would you guys like left in the bearing journal area? .005/.010/.015/.020? I can change the cutter comp and adjust it somewhat. I’m also wondering if I can add the reliefs for the bearing tangs for Cleveland and FE to the cap, I think they are located differently. First batch only had the tang relief for FE.

Does it have any markings or scratch marks on the rear of the block?

I'm very interested in the first 2 years of the FT, '64 & '65.

I don't have and have not seen one of these blocks so I have no idea. Richard(FERoadster) replied to a WTB post I started in the Private Classifieds forum.  I will ask if he can chime in or post some pictures.

I'm running with the assumption that early model year blocks would have a better chance to be cast with the bosses.  What I don't know is what would be considered "early"?  September to January?  September to April?

“Early” would be at least June 1964. I have the date codes logged for multiple C5AE-A blocks with mid June 1964 casting dates. So figure the summer months for “Early”.

From what I’ve seen that’s pretty typical that new model year blocks tend to start to be cast at least by June.

I'm running with the assumption that early model year blocks would have a better chance to be cast with the bosses.  What I don't know is what would be considered "early"?  September to January?  September to April?