My opinion would be a 750 on the carb if you are gonna go anyplace but stock ... and the performer RPM ( a good all around dual plane ) for street use.
As far as the heads go, either one will make a good streetable head, although i'd be tempted to move on up to the world sr. (Roush 200's), that would leave you alot more room to move up the performance ladder. Now the roller conversion ? I'm not sure i understand why you would want to go to that expense for a fairly mild street motor. There are lots of very good flat tappet cams on the market from mild to wild .... don't let the marketing people convince you that you have to have a roller cam to make horsepower just so they can sell you something more expensive !thats my 2 cents worth
