[blykins]

The FT blocks were meatier and thicker in the mains...What weight that is added wouldn't be noticeable between that block and a regular 390 block when driving the car around. They're both freakin heavy.

Like Mike says, you will have to a distributor bushing because of the distributor bore sizes that vary.

Also, I think the crank is significant to an FT engine....I think the snouts have a bigger OD....so you will have to either have it turned down to the regular 1-3/8" diameter....or make sure you reuse the FT timing cover (probably cast iron....yuck), harmonic balancer, and crank pulley. The FT's were also externally balanced.

I'd definitely reuse the crank and just have it turned down so you can use regular FE parts....harmonic balancer, front cover, etc. Unless someone's swapped it out, it should be a forged steel piece.