Big 10

[brennent]

My truck is a Big 10, which i know was the "heavy Duty" half ton model. I also know that chevy made to the big 10 model to get around smog regulations. Ive been doing a lot of research but what i can figure out is what it changes. I know GVWR went up to 6001 and there was no catalytic converter. What else did having the big 10 do? i don't think the catalytic converter dropped any power production, i was hoping one of you guys could tell me more.

[Irish_Alley]

have fun reading
http://forum.73-87chevytrucks.com/smforum/index.php?topic=28217.0

goes into detail about what had to be done to each gvwr. but the main thing was springs, tires, brakes and axles

[brennent]

Thanks a lot, interesting post