426 Allis bore and stroke. 4.25 x 5.00

I am ready to bore and stroke my 426 Diesel which is in a D17. It is a NA motor no turbo. Just looking for cheaper options than buying custom pistons, rods, and billet crank. I have the head at the flow bench place. Also have a cam, done by Vogel Manufacturing . I have learned you can take a 466 IH crank and offset grind it for a 5 1/2 stroke, using Allis rods. Kinda involved, the thrust bearing is in the wrong place and would need a IH flywheel. So if I use IH 466 pistons also 4.59 which is 546cu in. What I can't find is what is the distance of IH piston from pin to top. Also what AC piston is from pin to top. Or where you look to find out what various rods sizes in common engines are. If anyone has ideas I am listening! Thanks Vic

I believe the 4.59 is the 466e, while the old 466 has the long stroke and 4.3 bore, so be careful what you order.

I have found in the past that agkits sometimes has the information your looking for, it's helped me in the past when looking for valves to do some custom work.

I knew a guy that had a dt466 crank in a 466 deere block, now that's a ton of work.

Just off of memory, without going to custom rods, if you offset grind to 2.750" on the crank you can use rods from Ford 256/268 and 301 family, your current allis rods, John Deere 239/359 engines, some case engines used 2.75" rod journals.

The 5.9 Cummins is close, but slightly off, 2.716" on the rod journal, 1.576 on the pin with a c-c of 7.56". Probably too short for your project.

Next challenge is getting the small end of the rod in line with the piston your going to use. I know the Ford rods go from 1.5 to 1.625 to 1.75 on the high HP 456/474 engines. Deeres have a small pin, 1.37" on the 239/359, not sure on the case.

The piston you're thinking of using has a 1.826" pin which is huge when compared to available rods with a 2.75" journal. Case and deere probably have to most usable piston, I think some of the 336 and 504's might have a pin diameter that might work with a 4.625" bore, deere probably has the most usable piston from the non-turbo 466's, has a 1.5" pin which works nicely with a lot of different rod, fits right on a 256 Ford rod with some mods. Followed by the Fords with a 4.4" piston.

I'd love to talk to you about this and your 435, I'm thinking of putting together a light antique.

Mike

Thanks for the info. I have learned a
lot. Give me a call anytime. If I can't
answer I will call you back. 618 599
8041.

Mechanical 466 came in bug bore and small bore.

Late 1981 and onward used a 3-ring piston instead of 4-rings. Piston pin was then increased to 1.750" diameter. Conn rods were rifle drilled for piston cooling underneath the piston crown. C to C on rods remained the same at 8.50". All N-5-6 had this. All 8000 series did too. Very late 7060-80-7580's also.