Ub with big engine parts

FordNMan

Member
Thinking about making my ub into a puller and need some answers. I ve heard of people using a g crank with stock rods and m5 jugs. Now an m5 336 had a 5 in stroke and a g 403 had 6 in stroke so how does a 6 in crank work in a shorter m5 block or what mods have to be made to make the 283 maincase, 403 crank, 283 rods, and 4.81" bored out 336 jugs work
 
4.81 pistons have the pin raised higher, thus basically making the piston shorter and sit lower, which keeps it from crashing into the head at TDC, and makes the extra 1"of stroke all happen at the bottom of the bore so to speak.
 
So does the piston come out of the cylinder a little bit at the bottom of the stroke or are the skirts made shorter
 
4.81 bore, offset ground 403 crank to use 283 rods, end up with around 466ci. Pistons must have the wrist pin closer to piston top. Some of the custom pistons out there.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top