77 Chevy K10 Silverado Build

[bmchevy1979]

First would probably be manifolds or headers with smog tubes a smog pump and it shouldn't require a Cat because of the heavy duty suspension Headers must be CARB approved and always seams to change as to which are legal and having the sticker with the CARB certified number helps a lot. intake is probably the original you will need the original style air cleaner with functional heat tube to manifold or header that's all I can think of off the top of my head