I do the close to the same, minus the bowl work and gasket matching, run the 1 5/8 headers, add a little compression, and run the old Comp 268H High Energy cam. With a '71 T quad intake and carb, mine went 13.0 in a 74 4sp Cuda with 3.23s, drove it daily for 2 years, and passed emmissions twice. That was back when I could shift tho...lol.