mikey59 5 Posted April 27 Is it possible to put a 450 jug on a 400 lower half. And use the 450 head . Iam not having problems with my 400 . Just one of those things I've always wanted to do. The 400 has what 28 hp. Just thinking of a way to get more Share this post Link to post Share on other sites
jeepwm69 7,233 Posted April 27 450 jug will bolt on. Keep the 400 head for a compression bump, as it has a slightly smaller combustion chamber. 1 Share this post Link to post Share on other sites
mikey59 5 Posted April 27 Can you go to the 450 piston and use the 400 connecting rod ? Share this post Link to post Share on other sites
ATC4ever 1,014 Posted April 28 17 hours ago, mikey59 said: Can you go to the 450 piston and use the 400 connecting rod ? If the pins are a good match, i cant see it being a problem. I switched a 420 cyl/piston with a 475cc. Went right together. 1 Share this post Link to post Share on other sites
jeepwm69 7,233 Posted April 28 19 hours ago, mikey59 said: Can you go to the 450 piston and use the 400 connecting rod ? Yep. 450 jug and piston will bolt right onto a 400 bottom end. You can use either head, but the 400 will give you a bit of a compression bump Share this post Link to post Share on other sites
