[Ron61]

Brent,

The bell housing should bolt up as they are both Fe blocks and essentially the same. If you get the flywheel with the 390 I would think it would be ok but some of the other guy's that know more can help you with that. I once changed out a 390 to a 427 tunnel port and my 4 speed bell housing bolted right up to it. I did change the flywheel as the tunnel port had one already on it from the builder and never had any balance problems.

Ron