Looks like a solid plan except for the trans...go 80e and be done with it. A built 60 wont last in a 10 or 11 sec truck. Go ahead and do the walbro 450 with a hotwire kit and use all the stock fuel system minus injectors of course.
99 RCSB Z71 5.3 on3 78/75 and a built 80e ...69 CAMARO LS1 T56...72 C-10 SWB...87 CCSB V3500 waiting for a Heart transplant
2003 2500 Yukon XL Stock