lo4x4

HEY ALL...I have a 1995 lowered gmc 4x4....big wires...big tires and brakes ...big stereo...trying to tune for big hp...figured this forum would be a good step in the right direction...i am running dynamic efi with a tt-1 wideband controller on a 355 forged botton end, full roller topend. trick flow 195 heads..edelbrock mpfi conversion....ati-procharged d1-sc with a 3:10 pulley , intercooled is 25x6x8..rated to handle 600-700hp, a1000 fuel pump with controller, -12 pick up to -10 feed to rails that feed 8-62# pico injectors to a vac /boost ref. fpr...and a -8 return...hoping for the best... any advice ...thanks