Help decoding an engine
05-08-2018, 01:12 PM
#1
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Help decoding an engine
I am french, excuse me for my aproximatif English
The engine and on my corvette of 1973. I search the origin, can you help me?
small block 350ci 15R525848 T0122CMJ
Thank you
The engine and on my corvette of 1973. I search the origin, can you help me?
small block 350ci 15R525848 T0122CMJ
Thank you
05-08-2018, 01:19 PM
#2
Re: Help decoding an engine
The block number behind the drivers side head will tell you if it’s a 305 or 350.
http://www.nastyz28.com/chevy-engine-code-stampings.php
http://www.nastyz28.com/chevy-engine-code-stampings.php
05-08-2018, 09:17 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: Help decoding an engine
How do you know it's a 350? It looks identical to a 305 when looking at it like that.
Normally the suffix code can tell what block it is however your CMJ can be a 305 or a 350.
In 1980, it was a 305. In 1974, it was a 350 police special rated at 160hp. In 1975 it was a federal rated 145hp.
You're going to need to get a casting number off the block to better pinpoint it's origin. What it originally was doesn't mean a whole lot.
15R525848 = Last part of VIN from original vehicle.
T0122 = Tonawanda engine plant January 22.
Normally the suffix code can tell what block it is however your CMJ can be a 305 or a 350.
In 1980, it was a 305. In 1974, it was a 350 police special rated at 160hp. In 1975 it was a federal rated 145hp.
You're going to need to get a casting number off the block to better pinpoint it's origin. What it originally was doesn't mean a whole lot.
15R525848 = Last part of VIN from original vehicle.
T0122 = Tonawanda engine plant January 22.
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