Chevrolet started using the side motor mounts in 1958 on the passenger cars, the trucks still used the front mounts however they did have the bolt hole boss' cast but not used. 1955 thru 1957 SBC V8's did not have the side mount boss'.

I don't know when GMC switched...

Mike B smile


Mike Boteler

1956 Chevy 3100 Resto Rod
1952 Willys M38 Army Jeep
1983 Jeep CJ7 Laredo
1984 Jeep CJ7
+++++
Silver Spring, MD