Just an observation here, but if that was my kart and I already had a new 420
and a torque converter that lay down style motor ( that's what I call them )
would have been out of there last week. It looks like you have a lot of room for
welding on a motor plate and you say you know how. I have never owned that
style engine and frankly never will. The dependability, ease of service, and power provided by the industrial style engine would make it a no brainer. I own
5 karts, one I bought 14 years ago brand new the others all used (all 15+ years
old ) and they all ran over the last three years. IN my searching I can't tell you how many later model karts with with the lay down style motor that no longer
ran I saw advertised. Seems like they all have reverse, electric starting and
nothing but problems. In fact a couple of times I even thought about buying one and converting it to a predator style motor but I don't know how to weld
So just kept looking until I found the other style kart. Good luck with your project. Show is some pictures as you proceed.