If you can come up with some 974 castings and have them proffessionally ported, they will support a 416 pretty happily into the 11's, especially with a solid roller cam. Edebrock LD340 or regular Performer RPM would work well and help with the stock look. I really like this build principle, too, because there were some seriously fast cars built before the advent of relatively inexpensive aluminum cylinder heads and stroker cranks.
