Looking at an 88 firebird and this is in it. Its not an SBC and the owner has no idea what it is. I think it might be an oldsmobile but I'm not sure either.

 

Yeah, looks kinda like it...

Also looks like a little too much "creativity" (wink wink, nudge nudge) was used in "installing" it.

Might make an OK parts car if the body & interior are in good shape, and if that motor isn't welded in or something, to where you can't get it back out.

 

Yup, that's an Olds.
Based on the thermostat housing and valve covers.

 

Yeah I figured it probably wasn't worth the hassle. I really just need a straight roller hardtop 3rd gen that doesn't have fist sized rust holes in it.

 

The upper radiator hose and the alternator bracket are a nice touch , I'll bet Sofa's right about it being welded in there ....

 

I guess someone wanted it to be proper Buick/Olds/Pontiac complete with none of those filthy Chevy drivetrain parts.

 

Chevy to olds isn't really a big deal if I remember correctly. I swapped one into a cutlass I had back in the day and I think all I had to do was change the mounting blocks on the crossmember. It was over 20 years ago tho...

 

After careful consideration.... It looks better than a lot of SBC swaps I've seen on Craigslist. I mean it doesn't even look like he cut a huge hole in the hood, and it doesn't have that stupid triangle Edlercrock aircleaner.

That has got to count for something.

 

I would actually try and get the numbers off the block and see what motor it really is. It may only be a 350 or (gasp) a 307, but on the off chance is a 403, those were a great motor.