I highly recommend A/C! If you race or drive the car fast like you stole the Car, just turn the A/C that is what I do more power to your motor! I live in Hawaii and it gets Hot almost 365 days a Year! I drive mostly with the top down and the A/C full blast! I have A/C and I would not have purchased the Speedster without it! The only thing I did, was raise the idle on my Carbs, because the motor used to shut off at Street Lites or at a long stand still. I have the under the dash A/C unit the ones I see in Street Rods or Classic Cars. I have seen another owner of a Porsche Replica Dave D. he has the cools Vents in his Dash.
Kawika55