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Transmission compatibility
#1342774 Sun Jan 19 2020 04:10 AM
Joined: Jan 2020
Posts: 1
My boy just bought a 1980 Chevy C-10 as his first truck just turning 16. The 250 strait 6 with a 3 speed in the floor. The truck was bought with a blown head gasket that ended up being a blown head. Which surprised me cause it doesn’t have the exhaust and intake cast into the head. Anywho, it seems to be difficult to find the proper head and getting a new one means we rebuild the engine. It would be smarter in my opinion to pick up a long block 250 and roll with that however I feel like this is eventually going to end up with a 350 and I feel like it’s better to just start looking for a 350 now and not go double on an engine when we already need to put a new one in.

My question is does anyone know if the transmission would bolt up to a standard 350? I’ve been told no by a source that I don’t think is knowledgeable and I can’t find information on the net that answers this. I haven’t got any casting # and I’m just smart enough to know when something is broken. Not being the smartest guy in any room any help here would be awesome thanks in advance.

Re: Transmission compatibility
Blueline #1342776 Sun Jan 19 2020 04:17 AM
Joined: Apr 2005
Posts: 8,925
Grease Monkey, Moderator General Truck Talk & Greasy Spoon is for pre 1973 Chevy/GMC Trucks. This post was placed here because it is the only forum where we discuss modern vehicles.

'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2)
‘39 Dodge Businessmans Coupe
USAF 1965-69 Weather Observation Tech (got paid to look at the clouds)

"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!

Re: Transmission compatibility
Blueline #1342785 Sun Jan 19 2020 10:09 AM
Joined: Feb 2001
Posts: 6,829
Master Gabster
I would check with this guy.. A very reliable member of this forum. He is near KC. You can send a PM here or through his site.

Ron, The Computer Greek
I love therefore I am.

1960 MGA Roadster Sold 7/18/2017
1954 3100 Chevy truck in the Gallery
2017 Buick Encore
Pix on Photobucket
Re: Transmission compatibility
Blueline #1342788 Sun Jan 19 2020 01:18 PM
Joined: Feb 2001
Posts: 1,340
Shop Shark
Yes it will

59 apache 1/2t
261 short stepside
Re: Transmission compatibility
Blueline #1342809 Sun Jan 19 2020 04:20 PM
Joined: Jun 2004
Posts: 8,211
Master Gabster
The 6 cyl. bell housing & trans. will bolt up to the V-8 engine.
You should be able to find a used 6 cyl. head any where. The interchange is wide spread. Except for the intregal head that you are familiar with. You wouldn't want to use one of those. I'm surprised yours has the external manifolds. 75 & up pickups went to the intregal head. The Cameros & Chevells used the external manifolds. Perhaps yours was changed over at one time.
Reply if you have any more questions.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1956 Chevy 1/2-Ton Pickup

Re: Transmission compatibility
Blueline #1342817 Sun Jan 19 2020 04:53 PM
Joined: Mar 2014
Posts: 1,611
Shop Shark
You will spend more on a rebuilt long block 250 than a new one. But you may have to bend some rules a bit. Here is a starting point:

Down at the bottom of the page. You'll see it. These (like the 235) are popular irrigation pump engines. If treated properly, they'll last a very long time. Good luck.


1952 1/2 ton with 1959 235
T5 with 3.07 rear end

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