3.8" inches
3.8
Yes
6-8 on stock 3.8 pulley. max is about 15-17.
One place to get parts for a 1970 Pontiac Grand Prix is at the website Stock Interiors.
It should be 2 in
6-8
depending on the size of the supercharger.. 30% to 40%
You can put a supercharger on a stock engine it depends on how much boost you run wether your engine can handle it or not.
simply take out the hex screw located on front of the supercharger nose. then either use a big syringe with a hose to suck out the oil or grab an old hairspray(or similiar) pump-spray bottle and take the pump part and stick down in their and get out the oil. I would also recommend changing the coupler while your at it if it is stock.
260 hp and 280 tq.
my Magellan maestro showed 142 mph in a stock 2007 grand prix.
I would recommend plugs, wires, high flow air filter(k&n, spectre, etc.)supercharger oil, supercharger coupler if its still stock, and engine oil.