anybody here any good at setting up a 390 ? i have it timed at 6, but it seems to lack the punch if you know what i mean. i am no stranger to working on cars but i am no expert at setups. the carb which is new came off my 360, do i need to rejet it for the 390 or change some of the settings ? i know nothing of this. i could use someone who be willing to get hands on with my 390 and help me get it running smooth. and on another note, my kick down lever seems to want to stay in the down postion, it wont spring back up. i called dougs and he said something about the clip coming off. is this an easy thing to put back togather ? other then that the tranny is fine besides the fact that it needs the gasket replaced and seems to be leaking out the rear. is this seal easy to change, i have a short shaft bolt on shaft.