Yeah I have home made ones on stock frame mounts. If you need I can measure the block to mount surface to motor mount to frame pad distance. I had the fab skills and tools and have a philosophy of put the important stuff where it matters and fill in the gaps. Thats what i did here.
I guess what I am saying is its possible to fit a truck pan in a G body with stock accessories and have everything fit, its just nobody seems to publish a list of what parts actually work unless you buy an entire kit from Holley. People make 1" setback, slider, and whatever mounts and swap power steering pulleys, oil pans, and other parts at random until stuff fits. There is no recipe that just WORKS for an affordable price that people actually publish.
That TSP clone holley pan is pretty new to the market, not sure anyone has used one on a G body yet.
Even shops like bhp rods ship mounts with a GM musclecar/5.3 h3 pan which is pointless since its like an inch better than the stock truck pan.