truck engine master 72 and 73 ?? confussed

[ianrobinson]

I have 2 chevy 350 engines one is out of a 1 ton 73 van and the other is out of a 72 1 ton motorhome both engines are 4 barrel carbs blue intake and valve covers but block is orange the suffix codes on the 73 block is
K12 18 CMJ 74L436231 and the suffix codes on the 72 1 ton is
K02 08 CMJ 75L312202 everyone keeps telling me its a 74 police engine turbo 400 or a 74 chevelle 145 hp why would both trucks have car engines 2 years newer then what truck they are in or is it no one has the truck suffix codes only the car suffix codes ? i am also from ontario canada mabey we have different stampings in canada any help i would really appreciate ... thank you in advance i am hopping someone has the same engine or gm just put these engine in the 1 ton trucks

[z10kl]

They are not the original truck engines. They are car engines. A truck engine starting in 70 had a T as the first letter in the suffix.

[cdowns]

you asked the same question yesterday in the engine forum and got good correct info

maybe read up on board rules pertaining to double posting

[ianrobinson]

sorry i didnt know i couldnt put it in engines and the truck fourm i did get good information yesterday but i was thinking mabey alot of guys dont check out the engine page as the truck fourm , i am just courious if the suffix codes in canada are the same as the states no one has answered that yet ?

[ianrobinson]

were the 72 and 73 chevy engines bad in the 1 ton trucks ? cause the motorhome sat in a park for 25 years and only had 54,000 km on it thats what makes no sense to

[ianrobinson]

Holy schitt, it must be the lunar eclipse, because the Grumpster is wrong!

C does not equal car, and niether T for truck. IE:
CGR = 1970 400 MT 265 hp full size truck
TCHC = 1978 350 Camaro / Lemans
GM used almost every letter in the alphabet. My resource shows CMJ as being a 1974 T400 Police, or a 1980 305 AT Camaro. FWIW

i got this post from another site so it might be possible the van engines could start with the cmj then and the suffix codes wernt recorded or kept for the vans

[GASoline71]

It's a motorhome. Some sit more than they are driven.

There is nothing wrong with 72 and 73 GM 350's. The heads were beefier as well.

Engine section of the site has a lot of traffic. No need to double post.

So are those the actual suffix codes for your engines?

Gary

[ianrobinson]

yes both of those suffix codes and vin numbers from the top post are the real engine vins and suffix codes the ones i posted from the other guy are just an example trucks and cars can come with t or c i believe