Re: 123cu swap to 135?

Posted by Hugh MacKay on January 02, 2006 at 04:15:17 from (216.208.58.109):

In Reply to: Re: 123cu swap to 135? posted by Jeff311 on January 01, 2006 at 19:46:00:

Jeff: Are you 100% sure the blocks are different? I have never tried this, however about 18 months ago there was a guy came here to YT discussions wanting to put a C-135 in a Farmall 100 for tractor pulling. At the time the consences was the only problem he would encounter with a 340 engine was the crankshaft and flywheel being different. I'm not sure which route he chose in the end.

I do remember he was advised of three options, with a couple of variations; bore a C-123 block and install a 404 crank, find a 404 engine, find a 330 or 340 engine and either change the crank or modify the crank and flywheel. Most folks seemed to think if he went the 330 or 340 engine route, finding a 404 crank would be easier than modification of the existing crank and flywheel. I'm not sure finding a 404 crank would be easy, that version was not a high production numbers engine.

My only involvment in this discussion was going through some specs I had at hand, re the idea boring the C-123 engine and finding a 404 crank. We did a complete comparison on everything bore, stroke, valve settings, cam, etc., etc.

This will be in the archives, not sure of title, don't remember his name or handle off hand. It will come to me in the next 48 hours. There will be 2 or 3 threads on this subject. I do know he was getting the strongest advice to bore the C-123 engine and be satisfied with larger bore, and forget about the longer stroke, it wasn't going to change power greatly. My thoughts at the time was find a 404 engine, as he would probably need to buy a complete engine to find a good 404 crank anyhow.

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