how do i know if its a 305?

[jim_in_dorris]

I just decoded my vin # and it tells me the truck came with the L03 305. I don't know if its the original engine, how can tell if its the 305 or a 350 without taking the heads off. I tried to find casting numbers, but nothing is obvious

[doublelow49]

I just decoded my vin # and it tells me the truck came with the L03 305. I don't know if its the original engine, how can tell if its the 305 or a 350 without taking the heads off. I tried to find casting numbers, but nothing is obvious

Here are a couple of links that may help.


http://www.geocities.com/meanracing/BlockCastingInformation.html


http://www.nastyz28.com/chevy-engine-code-stampings.php#suffix

[Busted Knuckles]

Leave the heads on it, get the casting number off of the ledge on the back of the block, driver's side. Then check at www.mortec.com. That's the most complete casting number site I've found and it's always been right when I checked anything there.