First of all i'd like to thank anyone that has some input on this one. I'm dropping in a 1973 pontiac 400 in my 1967 GTO, when we bought the car it had a 1975 pontiac 350 in it. I pulled the 350 and had a friend rebuild the 400, and I have been working on getting the 400 in the car but i've run into 2 problems. First, I am now using tall moroso valve covers and the driver side is hitting the brake booster. Second, I have the motor in the engine compartment bolted up to the auto trans, and have the new Ramair resoration exhaust manifolds bolted on to the round port Edelbrock Aluminum heads, the problem is that I cant get the motor mounts to drop down onto the brackets on the frame where they bolt up. It looks like the engine is about 1/4" too far back in the engine compartment and is on some kind of bind. Has anyone on here had this problem with the round port exhaust manifolds, and also does anyone have an idea how to get the tall valve covers to clear the brake booster? Any advice on how to get the engine in and running would be greatly appreciated.