301 bore size?

I'm working on one that is bored to 3.975 (3&15/16's) with a 5" stroke.

A 4" bore would be nice.

Thanks

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This is "Hot Farm" (or something like that). It's a farmall 460 which was doing o.k., but needed more power.

When taking the engine apart, it's going to be a more expensive and complicated project than expected for sure. BUT it is interesting.

Just looking to get the most out of it a somewhat reasonable cost.

So far we found the straight valve truck head.

I have a good cam grinder for the regrind

I need a crank and rods so we're researching everything to make good choices. We'll stick with the bore size, cylinder walls are good, just a light re-hone. A 383 cube combo (3.9735" X 5.25") sounds pretty good.

This engine has Farmall "A" rods in it now. I think they are 7.140" long. They aren't strong enough and the rod jounal is too small. We could easily move the pin height up for a longer rod. As you said it will need the custom offset rods cause of cam clearance issues now. Have to do some measuring for 5.25 stroke and see what kind of pin height I can get away with.

Does the 301 block bore to 4" without problems?

I can do a half fill if needed.

It's a real economy stroker job and it's not staying together the way it was built.

Since I'm changing the rotating assy, might as well see what can be done.

with a 4" bore and the current 5" stroke it would be 377 inches with a 4" bore and 5.25 stroke would make 396 inches

A 4" inch bore would give me a ton of automotive pistons to choose from

O.K. this was the 301 to start with so I guess that much is good. Still from what you say I would need to sleeve all six cylinders with thick sleeves and then do a full fill.

This block already has had one sleeve installed as a repair, so maybe I just leave it at the 3.9375" bore and build the 377 inch combo?

Either that or start with a "fresh" used block