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If this still has TBI injection, you need a cam that the stock computer can adjust to and work effectively. Bogie suggested something around 195/202 duration, which is probably not much more aggressive than the stock TBI cam ( I think it’s in the upper 180’s). However, if you combine it with a good dual exhaust system it will help your power, and sound better. You are restricted by the capabilities of the stock computer.
2500 rpm at 75 mph is about what I expected, since my K25 with TH350 and 4.10 gears runs about 2500 rpm at 60 mph. If you want lower rpm you might just swap to bigger tires and get a good looking stance at the same time. Stock tires on my truck are about 31” and it’s common to use up to 33’s without any lift kit. I’m not sure if the newer trucks have the same space/height.
2500 rpm at 75 mph is about what I expected, since my K25 with TH350 and 4.10 gears runs about 2500 rpm at 60 mph. If you want lower rpm you might just swap to bigger tires and get a good looking stance at the same time. Stock tires on my truck are about 31” and it’s common to use up to 33’s without any lift kit. I’m not sure if the newer trucks have the same space/height.
