What engine do I have?

[turtlenut2]

I made a deal with my cousin to change his engine. He supposedly bought a 350 that I had to pull out of a C60 firetruck. It appears to be a small block chevy (it had an adapter plate, so that it would hitch up to the monster standard tranny) the harmonic balancer appears to be from a 350 but the flexplate that came off his old 350 doesn't have a big enough centerhole to fit the crank. I was told that it has to have 3 freeze plugs on the side if it's a 400sb (it has 2). How can I tell if it's a 383? Or am I just looking at it wrong?

 

[1-ton]

It may be a tall deck 366/427 truck engine.

 

[MTChevy]

got some casting numbers?

 

[turtlenut2]

How do I tell?

 

[4X4HIGH]

First off, how many bolts holding the valve covers on? 400 SBC's came with either 2 or 3 freeze plugs on the side so that doesn't help you any. 383 was not a factory GM engine but rather a stroker engine that people commonly build. How many bolts holding the intake manifold on?

How about taking a pic of it for us to determine SBC or BBC. With the info i just gave we can determine that much for you anyways.

 

[turtlenut2]

There are 4 valve cover bolts each. 12 Intake manifold bolts. casting numbers I found 3970010 and E145. Also has left side dipstick.

 

[4X4HIGH]

3970010 is a 350 chevy, could be either 2 or 4 bolt main.

 

[turtlenut2]

4 bolt main with 2 peice rear seal. My problem is finding flexplate that will fit the crank. I've ordered one for a 350 but the center hole is too small.

 

[sweetk30]

if you orderd one for a 1 peice rear seal newer motor the crank style is diffrent. soinds like that.

my friend pulled a 350 from a c60 bus and didnt have any real problems.

 

[u2slow]

Hmmm... I know there are slight differences on the 350s that came in the heavier trucks. The heads have larger accessory holes for example. Perhaps the crank is unique also?

If all else fails, try the stealership

 

[76zimmer]

I think the commercial applications used a unique setup for the flywheel flange on the crank, as they used bigger diameter flywheels.