Supercharge my motor

If you want it to remain cheap and dependable, leave it stock, except for the exhaust, change them for long tube headers. If you haven't had trouble with the exhaust bolts, you will. Changing to a diesel is more than just changing the engine, transmission, and cooling system. The drive-line and rear end will not hold up to the torque. Forget a Ford diesel, they just do not hold up unless you de-rate them. The ideal diesel would be the Cummins 6.7L and a Alison transmission, but the drive line and rear end will still be a problem.