How can I tell if an 80 has the L82 over the L48? Thanks for any and all help.

 

If its an L82 the fifth vin number is going to be a 4 or 6 if its an 8 then you have the L42

 

i beleive the only difference is that the l82 has some head work dont to it

 

Thanks alot guys! I knew the L82 has alum valve covers but could not remember what else.

 

To the best of my knowledge, the L-48 has a 2 bolt main block and the L-82 has a 4 bolt main.
....and, a vin with xxxx6xxxxxxx is an L-82, the8 is an L-48, and an "H" is the LG-4 with a 305 cid V-8.

 

In '73, the L82 fifth digit was a T. The L82 also has the big valve heads, at least in '73 it did. Did the '80 model still have the data plate on the console? I realize that these are easily changed.

 

I only have data on the '80, I have not found a data plate on the console, but it could have disappeared, somewhere along the way, before I got my '80 L-82.

 

Hi deb1, here's the info from the interchange manual, 1980 305cid will have H in the fifth digit on the enging pad. 1980-1981 350cid L82 the fifth digit will be 6, 1979-1980 350cid L48 the fifth digit will be 8. Also the 78-79 L82 had an aluminum intake from the factory. The block is the same for all the 350's but you can get a good idea if it's a four or two bolt by the engine casting number above the bell housing on the drivers side. Internals are pretty much the same with the exception valve size and cam, the book shows the compression ratio to be the same for the L48 and the L82 in 1980 @ 9 to1. Write back with your engine pad and casting numbers and we can narrow it down.