Engine Identification
Thread Starter
Senior Member
iTrader: (1)
Joined: Nov 2003
Posts: 714
Likes: 0
From: Port St Lucie, FL
Engine Identification
When I bought my car the guy I bought it from said that it was a 305 TPI but a 350 TPI was swapped in. Is there anyway I can tell if he was telling the truth? Ive tried to look down behind the head to see if it says 5.0 or 5.7 but I cant see down there well enough to see anything. Any ideas? Any help is much appreciated. Thanks.
casting numbers, or go to mortec.com 
Senior Member
Joined: Jun 2000
Posts: 998
Likes: 0
From: Tuscaloosa, AL
Car: 91Z, 91RS, '84 Jimmy
Engine: L98, 355, L98
Transmission: 700R, T56, 700R4
There are also casting numbers on the side of the block, and on the head deck just in front of the pass. side head. Go to mortec.com for a full listing and pics of where the casting numbers can be found.
Or you could use a flashlight and a mirror to look behind the head.
Or you could just pull one of the heads and measure the bore.
Or you could pull the oilpan and measure the bore from the bottom.
Or you could use a flashlight and a mirror to look behind the head.
Or you could just pull one of the heads and measure the bore.
Or you could pull the oilpan and measure the bore from the bottom.
Junior Member
Joined: Oct 2003
Posts: 39
Likes: 0
From: Houston
Car: C-20
Engine: 260 boat anchor Mexican 350 (crate) TPI (MAF)
Transmission: THM-400 I turn 3500 (which is where my pos engine's power starts droping off) at 80 I need a 4L80-E
Place your foot to the floor if nothing happens, then it is a 305
Joined: Jul 1999
Posts: 12,101
Likes: 127
From: SALEM, NH
Car: '88 Formula
Engine: LC9
Transmission: 4L60E
Axle/Gears: 3.89 9"
Originally posted by C20T/A
Place your foot to the floor if nothing happens, then it is a 305
Place your foot to the floor if nothing happens, then it is a 305
-- Joe
Supreme Member
Joined: May 2000
Posts: 2,963
Likes: 3
Car: 1982 Z28
Engine: LS1
Transmission: T56
Originally posted by subliminal
As I said above, I cannot see behind the block to get the casting number. I was wonder if there was any other ways of telling a 305 from a 350.
As I said above, I cannot see behind the block to get the casting number. I was wonder if there was any other ways of telling a 305 from a 350.
Don't have one? Just pull a head and measure the bore diameter.
Maybe stretching a bit to see that casting number isn't so hard after all?
Thread
Thread Starter
Forum
Replies
Last Post
84z96L31vortec
Tech / General Engine
7
Aug 20, 2017 12:16 AM