gxv610 18 hp honda., I was looking at the block and it seems I can bolt it down as a horazontal . It looks like I would have to change the sump pan and intake seystems but is that all? Im not sure but it looks like the block would be the same and rotating assembly would be the same .
I got the motor for free so if I can convert it to horazontal that would be better in the long run for me.