I am not skymangs but I used speedway universal mount stands and chevelle 350 mounts. I could not figure how to use the stock s10 4.3 clamshell mounts without using the stock frame side mount. we did it that way on the 47 (moved the stock frame side mount back)
but I used the speedway universal weld in mounts and 350 70s chevelle motor mounts (4.99 any parts store) on the 49
I moved the motor 6" on the 47 and had to use an electric fan. I moved the motor 7.5 inches on the 49 to leave room for the clutch fan.