i have searched and found part # g63438 for autozone gabriel shocks. i beleive it said they had 12.5 inches of travel and were being used for about 4 inches of lift. i currently have 4 in procomp front springs and 4 in block in back. i carry alot of stuff in the rear of my blazer and hardly get a chance to take the top off, so my rear sits significantly lower than the front. i recently bought some 6 in bds spring for the rear to replace the blocks and hopefully level it out. i was thinking i would replace all four shocks well i was installing the new springs. will these shock be long enough or do i need a different part #? they will be going on 77 if that matter. any help or recommendations would be appreciated.