Im aiming for 350-380 and i say aiming as well you never know what will actualy come of the spec. Me ep85 i hope will takeit but i do have a back up plan if not haha (shhhhhhh grant, deebo n jake ;) ) as for gears i was talking with gaz at fest and he said you should see 140-145mph and i dont know if he rasied the rpm limit but i certianly will again given my spec. As for ratio the final drive can be altered to give a theretical 170+ mph top end but what that will do to the other gears and overall performance who knows as of yet but that is a project for the winter with mine. Over all a damn good fwd with lsd will take the power you are looking at well enough as just look at spuddys gt build! That cars insane on power!! The 4wds biggest downfalls are 1. No diffs available. 2. No known capability 3. Bloody expensive for new viscouse coupling 4. Stupid hard to get drive train parts for.