They don't need much, if anything, to be cool. The fastback sedans had it right from the factory. I'm a big fan of the "Spanish Fly" car illustrated on the first page.
Our '46. Hurst Front Mounted SBC hooked to the stock trans and rear end. Magnum axel and Posi Springs front and rear, 46 Dynamic Maroon, Grey Super Deluxe Interior. Dodge Lanser Caps. About 4000 miles since Body Off Resto.
My old 48...Some hot rod re-seller from Tx bought it off of eBay from me...Who knows where it is now.