hi there. another sledding season is upon us and i have a few questions about a sled. i've got a 1987 indy 500 trail fan cooled. the top end was blowen up. what i wanna know is can i put the pistons and top end cyclenders and heads off a 1981 indy galaxy 440 on my 87 indy 488 fan? is there a storke issue here at all? also that galaxy motor in pre-mix. is there a way to drill 2 new holes in the galaxy cylenders to inject the oil in the engine or do i gotta run premix?