He owns a 88 Sport Coupe that came with a 305 and decided to swap it out for something a little bigger. Here's the info. I got from him:
i just put a GM 5.8 in it......not ford 5.8, not GM 5.7, a GM 5.8L.........i cannot find ANY info on this engine.....all i know is it is all cast iron, 2 bolt main and has a Q jet on it (but no reason to assume it came with a Q jet), i got it from an 87 Z28 in a junkyard, but again no reason to think it is a facotyr motor because the only 350 available in an 87 Z was an L98

If you guys got any info on this motor or anything else please let me know. Or if you know of any links to this motor.

 

Here's a picture:

 

typo? :P

 

Exactly what that "GM 5.8 LG" means, I can't say I know.

There should be a full casting number nearby that. Post a pic of that.

 

That's kind of our think if it was some production error. Never heard of a factory 5.8L that wasn't Ford.

 

wow can't say I've ever heard of a 5.8 made by chevy... intresting.. whats the casting number??? How about the partial vin and suffix code off the lil ledge in front of the pass side head by the corner of the water pump?

 

It is 14093627 which is the 5.0 if I am correct but that doesn't explain it clearly saying 5.8L

 

could it be a 355 ci like the older camaros cam with...donno if 5.8 is that or not..just a guess

 

Thats a casting fubar its a 5.0, the stamp is just a tad sloppy. You can inhance in PS and clearly see the mistake in the mark. BTW Ive actually seen them jacked up like that in real life.

 

shot down!

what was thought to be a 350+ turns out to be a 305

 

Yeah, if you look at how the "8" is, you can clearly see it is but a "0". It takes a second to look at it for you to realize it, but it is in fact a 5.0L. The sides of the numbers should be as straight at that L is next to it, and if you look for straight lines on the sides of the "8", you can see them and then see them meet at the top to form a zero. Sorry bud.

 

A 355 is a 350 .30 over. No camaro came with a rebuilt 350, just new ones.

 

Older Camaros didn't come with a "355". There basically is no such thing. There are .030" over-bored 350s, which happen to have about 355 CI; but they're not "355"s, they're .030" over 350s. And cars don't come with over-bored motors anyway, and never have. So if a Camaro, or any other Chevy, came with a 350, then it was a 350 when it was new; 4.000" bore x 3.48" stroke.

That "5.8" number is mostly meaningless. Seems like more often than not, 305s happen to have "5.0" on them, and 350s happen to have "5.7", but not always. It cannot be used as a reliable indicator of engine displacement. Ignore it, it is of no consequence.

Always use the casting number to determine a block's bore.

 

What he said !!

To the bonus round...
In which year(s) did Chevrolet manufacture the 302 cid engine for the Camaro ?

 

67-69

 

*ding* *ding* *ding*... We have a winner !!

Yessir, the 302 was created by installing a short-stroke 283cid crank in a 327cid block, resulting in 302ci... only '67-'69 Z28s got the 302.

 

whats the easiest way to check the casting number on an engine thats still in the car? and where exactly will it be on the engine?

uh nvm.. got it

 

or it could be in a 350 block

 

there was no 350 block the 350 and 302 came from the 327 block wich all came from the 265 block

 

Thats exactly the point that I was trying to make, ede. When it was stated a 327 block with a 283 crank, i thought I would point out that the block is shared amongst other displacements.

 

It would be for 5.8 Liters Gasoline. Well, 5.0 Liters Gasoline in this case.