I have the chance to get a 850 for a decent price. Car currently has a 600cfm edel. Previous owner had a 750cfm on it before he sold it. He said it ran really strong with it. He said the car would throw you back into the seat..but I'm not feeling that power with the 600..... So would jumping to an 850 be too much? Built 403 olds motor with mild cam and is estimated around 400hp and 475 tq. Manifold is Edelbrock Rpm performer