70 Dart S6 to 383BB conversion - Cast Iron Manifolds

I have used the B Body HP manifolds in two big block swaps.. One a 440 and one a 383.. Both were automatics. I had to shorten the steering column sleeve to the firewall. I did not have to do any additional grinding on the exhaust manifolds. I do recall reading somewhere that there may be interference with the B body HP manifolds and the 4 speed Z- bar in the A body.