Now that you mention it, the engine dyno did not have accessories on the motor. An electric water pump was used and cooler air from outside was piped in through the ceiling. The dyno headers and exhaust were very comperable to what I'm running in the car today, so I shouldn't be losing much more on the street due to exhaust. If the difference in ambient intake air temp combined with accessory drag (running a vintage air frontrunner serpentine setup complete w/ ac, power steering and hydraboost) accounts for the perceived 60-70 hp difference, I think we have the "smoking gun" vs. the rest of my powertrain.... but I'm still a lil' uneasy about the numbers..
