JOE MAMA -- Congrats on discovering autocrossing...its addictive and so much fun!!! I've been doing it with my Challenger since I bought it way back in 1975... we should meet up same day! you need to baffle your oil pan or install the Miloden road race pan as a #1 priority if intend to continue (the factory oil pan has no baffeling at all... shame on MaMopar for not having baffles).
Regarding the fuel coming out of the side gas cap, that's a common problem with our cars (Challengers)... so, here's what you need to do: (1) get a new gas cap (vented, of course!); (2) Never run more than 1/2 tank when autocrossing (AX. or HSAX. or HPDE lapping)... better to run ~1/3-1/4 tank so to further avoid the spillage... running more than 1/2 tank is a guarantee that it will spill at least a little due to the high-g-force of LH cornering! (3) stuff and wrap a small rag all around and on top (under the flip cover) of the gas cap as a little extra absorption of any possible fuel that would/could spill out. Trust me... I know this from many years of experience.
IF you'd like to run a DOUBLE-DAY HPDE AND HSAX event, this coming wknd of OCT 7-8, 2017 look up
www.motorsportReg.com for the Midwestern Council of Sports Car Clubs event at Blackhawk Farms Raceway, Rockton, IL... its about 90 miles W/NW of Chicago, just west of Rockford, IL ... I'm co-chairman of the event... cash awards (over $3,000) for "consistency lap speeds" on the season-ending finalee on Sunday. You can run Sat and/or Sun.... Guaranteed to be a blast of fun!!! Camping inside the race track (I'm doing that) or nearby motels/hotels. My cell phone is on the registration form... payment accepted at gate... all spectators are free.