here goes, no replies yet, guess i'll post this on all the forums........ i can't find anybody (no recommendations yet) that can big bore my 425 xpd . any idea's? the 500 ho top end looks similar, is that a possible swap ?

 

I would goto Partsland.com and check out the drawings ... but the only real way to know would be to get the head and try to see if will fit.

 

and i amagin if it dosnt work, you could sell it on ebay or send it back