Im building a Shadow 2.5 turbo rally car currently and i was wondering if the shadow head could be swapped with a 1990 Colt turbo 16v DOHC or 1991 Laser turbo 16v DOHC. If so would i need shims or a thicker head gasket for valve clearance? I aslo heard the daytona shelby head and intercooler would fit. Which would be the best to use?