Hi fella, drive train in above post, as for the engine? Well it aint built yet!! but I want it to be responsive, punchy and bombproof (not allot to ask ), its going to be used mostly on the track and up on the twisty mountain roads up where I live so 400/400 ish engine will be sufficient hopefully . Four of my friends are just about finished building their engines all very different specs? Will wait and have a go see what they feel like to drive. If I could have someone else’s engine it would be Mike Rainbirds, seems to have all the angles covered