I think that cam is just fine and well-matched to the rest of the combo. If you want any bigger you could opt for the Comp XE 251/257 @.050. Once you get over ~252 on a Hydraulic flat tap on the intake you're usually better off just going to a solid. The SD is a great manifold but maybe for your combo a performer RPM and square bore 800-850 may give you a tad more off idle/roll on torque. The Eddy avs 800 works very well and generally can get better cruise MPG than a holley, Q-jets can be magic if you know how to tune them, I had an awesome Brad urban Qjet on a 10.5:1 455 olds that I dropped in a 77 Caddy Seville sleeper many years back.


I'd run a fairly tight 9 1/2" or 10" PTC or T/A converter, something that footbrakes to ~3000-3200 but tight enough not to feel at all slushy at part throttle in a heavy B body.

Overall you have a very good, and well thought-outrecipie for a 535-550-ish horse pump gas motor. You didn't get hung up chasing high RPM power when what you really want is a ton of face distorting mid range torque, it's really what the 431-470 inch motors with standard sized ports do best, and they do it very well.