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Anyone know what the largest stroke size I can use in a factory 68' 440 block? I was going to go with a 4.15 stroke but I see 4.25-4.5 and 4.6??? If I use an external oiling system etc. just wondering if I can make a 528 ci out of it or larger if possible instead of the 499 ci. I was planning...

A relative just called to see if I wanted his 1970's jeep. He said it has a 401 ci BB engine that runs real strong but the jeep itself is kinda rough. I'm just wondering if any of you are using a 401 in any abody or what the rep they have overall. This is a big block engine size from AMC...