Ok to update this thread, it turned out its my fault, I forgot to attach the chassis eyelet on the ground strap. I did hook up the transmission strap, and it looks like the amps were trying to get ground from the roll cage, to the chassis, through the motor/tranny mounts, and then the - on the cable. Crazy. So I put it back and it still does dim but not as bad as it did. Also i did the 4 guage alternator wire swap from the alt straight to the battery and bipassed the old brown wire. The voltage reads 14.5 instead of 14.2 on the digital read out of the capacitor. So it helped a lot thats for sure. So just to let you guys know, it will definately make a big difference. thanks everyone. Oh and I did charge the cap before I installed it.
A guy told me one time "don't let yourself get attached to anything you are not willing to walk out on in 30 seconds flat if you feel the heat from around the corner"