oliver 77 stroker crank, rods, and pistons

Looking for some help. thinking about adding a 1/4" of stroke to my 77. what rods and pistons do i need to use and do i use original crank or get one out of a super or a 770 ? any and all help will be appreciated.

I think you'd want a crank from super 77 and offset grind. Post to the tractor pulling group and you'll get a better response.

You will want a Super 77 Crank (I think the 770 crank is the same but I"m not positive). The Rod journals are 2.25", you will need to get it offset ground to 2". This will allow you to use your original fleet line 77 Rods, and you now have a 4" Stroke. You can use an Oliver overbore kit that will take you to 3.75" Diameter Bore. These sleeves will drop right into your block. Now when you mock this all up your new pistons will stick above the top of the liners. You will need to have this amount cut off your pistons. I had my pistons cut flush with the top of the liners. I then used a .030 copper head gasket. Your compression will be up a great deal now. You will have to figure out the volume of your head and make sure that your new compression ratio is not too high. With the 3.75" Bore and 4" Stroke you will have a 265 cubic inch engine.

While you are there, an upgrade to super 77 clutch should just bolt on. Or you can have the 77 flywheel drilled for an 88 clutch. I"m not sure if the original 77 clutch can hold the power or not?

There is a lot of good information on this exact build in the archives. ChucksOliver77 is pretty knowledgeable on this build.

I have the crank and rods all machine work is done. I will sell for $500. I am in northern Ohio

do you still have crank for sale

(quoted from post at 08:03:42 08/25/14) do you still have crank for sale

Click to expand...

I have the block with new pistons/sleeves, head is done. Rods conditioned.
And crank ready to grind
[email protected]

(quoted from post at 08:03:42 08/25/14) do you still have crank for sale

Click to expand...

I have the block with new pistons/sleeves, head is done. Rods conditioned.
And crank ready to grind
[email protected]