Posted by the tractor vet on January 09, 2009 at 08:27:08 from (75.19.124.16):
In Reply to: 251069 Versus 354898 posted by Wild Bill Caldwell on January 09, 2009 at 07:52:54:
Granted i am by know means the expert guru on that block here as i have never tryed to shell we say enlarge one but if i can get Cummings 855 sleeves into a MM U block and go from 335 cubes to 609 and still make it look factory and hold water and start easy . I would have to really sit down and study your block and do some figuring as to just how much of bore and just how much stroke ya could build into her . But if you are set on the 3 1/4 deal hey go for it just find a machinist that has the toys to play with . Now here is a thought on this if you are worried about taking .210 out of the bottom then don't take that much out and take some off the sleeves and a little off the block and make the sleeves a PRESS fit this should seal the water and if it dose not seal up 100 % then just put in some K & R block sealer run it with just water get it good and hot then drain it and let her sit for 24 hours then she is good to go . I did this on the M M U as we had to WELD the Cummings sleeves in and i end up with two pin hole that had a tiny little drip on the one block the K & R sealed it wright up and we ran antifreeze in it after that with no problems all the time we pulled it. Now if ya don't mind spending a few bucks here and ya want more like all of us do i would invest in a set of high altitude pistons then do some trick work on either head you decide to run . Send the cam out and at least have it rebuilt and as a new set of lifters maybe change the valve springs or shim them recurved the dist to limit the total advance curve to let say 27 to 29 degrees as this will help on the lower end degree in the cam and maybe a two degree retard but this ya have to play with as a retarded cam may not work well and ya may have to run it a couple degrees advanced .
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