Thread: What year is this SB, Code and Casting show different years

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That engine comes up just as you and Gary both found, essentially a truck engine that can either be 2 or 4 bolt mains, and either a roller or flat tappet cam. It is not a Vortec, and there are no factory roller rockers that I have ever seen, even in marine applications. Are you sure they ARE roller rockers? Post up a picture, it will be interesting to see.

It looks like they made bazillions of that same engine over that time span. I think the first center bolt valve covers appeared in about 85, but don't hold me to that.

Don

Originally Posted by Itoldyouso

That engine comes up just as you and Gary both found, essentially a truck engine that can either be 2 or 4 bolt mains, and either a roller or flat tappet cam. It is not a Vortec, and there are no factory roller rockers that I have ever seen, even in marine applications. Are you sure they ARE roller rockers? Post up a picture, it will be interesting to see.

It looks like they made bazillions of that same engine over that time span. I think the first center bolt valve covers appeared in about 85, but don't hold me to that.

Don

Ok guys, THIS ENGINE HAS A ROLLER CAM AND ROCKERS! I am offended that you question if I know what they are! An engine this old could have been rebuilt with these parts! GM did put roller cams in some engines from 1986-94.

The question was not if it had roller cam and rockers but why the Code and Casting numbers don't match years.