GM crate engines that cover the range from 69-85 are drilled & tapped for the front mounts. I have installed several of them in TF trucks with the stock mounts. The original engine in my 88 truck and the factory replacement engine were not drilled and tapped for the front mounts and did not have provisions for a engine driven fuel pump.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine