Ford 860 engine rebuild kits

[ShowMEguy]

I've been on the prowl looking engine overhaul kits for the 860 that I picked up with broken rod.
I'm trying to figure out the package here on YTMAG that has this?(Contains Super power set overbore to 4.0" PK109 sleeve and piston kit (Part No: BEKF109M-LCB))
I'm assuming the cylinder must be bored out to accomodate these bigger sleeve? If I was to go this route just how much more power is a guy gonna pick up? Anything noticable on the seat? I'm doubtful, and am leaning towards the 3.9 STD bore sleeve kits.

TIA.
 

[Dean]

Without other modifications, expect about a 3 PTO HP increase.

Dean
 

[jbp]

Had a cousin with a 960 that he had the 4 inchers installed. There was a considerable increase in power, and yes you could definately feel it from the seat. Don't think you have to do anything to the block as they used a thin wall sleeve to get to 4 inches. You will gain almost 9 cubic inches displacement. Joe
 

[WayneIA]

Back 40 some years ago when I was farming big time, I put a set of 4 inch pistons in my 960.. Hardly noticed the differenc in the seat of my pants,but went to the gas barrel oftener. Back to standard the next overhaul
 

[ShowMEguy]

10-4... thanks for the info all.