Ok, here is my dilema. I have a 1979 GMC Seirra 25. What is it...1 ton, 3/4 ton? Also, It has 8 lug axles. The rear is full floating, and it has he bolt around the pinion only and it has small brake drums. Is there any way to identify it?? Also what front axles where available in 79? Help me, because mt dad wants to parts he truck but I wanna know what the stuff is b4 I tare it apart it also has a sm465 if that'll help.