I've recently purchased a '58 Parisienne that is a 261 & Powerglide car. I've picked up a rebuilt '61 Pontiac 348 and will be doing an engine swap soon. It's my understanding the 6 cylinder iron Powerglide will not work with the 348? What would be recommended for a transmission? Aluminum Powerglide? Turbo 350? 700R4? I'd like to keep the swap as simple as possible. I've got a 58 V8 parts car that I can salvage the engine mounts from. Thanks in advance.