sweet sounding exhaust?

[ron88k5]

spintech makes race mufflers look them up on the net i got a pair on my 78 they sound great better than my flowmasters did

 

[chevy_tuff]

umm, stock besides, headers, intake and k&N filter

 

[84_Chevy_K10]

I would use 2 1/2" pipe for a 400.