Tunnel Ram?...no thank you! It's all I can do to tune one carb..let alone 2 of them! Joe,I'm seriously looking into purchasing a ProForm 1050 main body(4150-style)Supposedly,they actually flow 1050cfm,and bolt up to an 850 base..which I have! I have more research to do,though! I'd like to hear from more people who have tried them out!