I think you have a fine street combination. Put it together with the parts you have. We built a 426 with with a 256/260 solid roller, a 3000 stall and 3.23 gears. It's tough to get to hook up in any gear. The carb? It's mostly for the street right? You already have the 750, why spend more money before you try it? What gain would there be in street performance with a 850 or 950. Lordy, you've spent enough money in the past, put it together and enjoy what you have now.
