'80 6yl into '65?

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Sep 24, 2007 | 04:30 PM

fordguy76

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Laughing Gas

Joined: Apr 2001

Posts: 1,191

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From: West Union, OH USA

'80 6yl into '65?

I have a '65 F-100 that had a bad 302 bolted to the stock 3spd.

The vin number says it was a 6cyl 3spd truck and it has 3.50 gears in the rear axle.

Now I just got a 1980 300 6cyl and C-4 automatic? (I have the rest of this truck still)

3spd is fine but since the '80 stuff is good I'd like to use it, however I'll need a shorter driveshaft and the pinions are different...

Will my old speedometer cable work with the automatic or will the '80 cable fit my '65 gauges?

Then I guess the Ignition box parts can be swapped from the 1980 carcass?

Thanks.

I've considered every engine from 302-360-460 that we have at home but the six runs good and smooth and the 1980 truck had no title and little future.

Sep 24, 2007 | 09:30 PM

63redtudor

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Joined: Jun 2004

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The 3spd would work with the 300 as the I6 & V8 have the same bellhousing. You'd need a different flywheel for the I6 though.
You might want to check the oil pan on the 300, I think (at least all that I've seen anyway) after '80, all trucks used a rear sump pan. Whether they were a 2x4 or 4x4. You might need a mid-sump pan for your '65.
I would keep all the ignition off of the '80, it should be the duraspark.
Edwin

Sep 25, 2007 | 10:22 AM

fordguy76

Thread Starter

Laughing Gas

Joined: Apr 2001

Posts: 1,191

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From: West Union, OH USA

will the '80 oil pan definitely interfere with the crossmember?

Sep 25, 2007 | 12:35 PM

63redtudor

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Joined: Jun 2004

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I'm not 100% sure that the oil pan will interfere with the crossmember. When I did my swap several years ago, I went the opposite direction you did, put an older 300 into a newer truck ('79 300 into a '84) & the oil pan was an issue. You may actually be just fine, but its best to check.
Edwin

Sep 26, 2007 | 10:11 PM

fordguy76

Thread Starter

Laughing Gas

Joined: Apr 2001

Posts: 1,191

Likes: 4

From: West Union, OH USA

I sat the engine down in the truck, however, previous owner had moved the frame mounts back further towards the firewall for their 302 swap. So moving them forward I should bolt right in and it appears so far that the rear sump '80 oil pan will drop down behind the crossmember and the only issue I forsee is the tierod if it sits that low once bolted in...

The engine bay of the '65 looks much shorter in length than the '80 donor and a '79 F-100 with a six my brother has, so wondering about my radiator choices I have some '70s six radiators...

Sep 28, 2007 | 09:46 AM

63redtudor

Senior User

Joined: Jun 2004

Posts: 305

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Not sure about the radiator issue, but I did finnaly find a link for you on the ignition:
http://members.***.net/joetrojan/
This is for a mustang, but it shouldn't be too much different for your truck (at least some helpfull hints)
Edwin