Replace engine on a 2007 Pontiac Grand Prix (with supercharger) or buy a new used car

u could look for a engine at a recycling yard for less that might be in better shape. the dealer rebuilt block is a gamble, in my opinion, cozz the block could be too old.

Do you mean the coolant is in the engine? you said gas leak bled into the engine which i have no idea what you mean about that

Go to carpart.com used. and find a engine. if you want to keep the car. buying another engine and having it installed can only be around 1200 total if your supercharger is good. if both are bad. you can just buy another one of those cars for 1800 to 2200 right now. in good condition

Scrap it. It will cost as much or more than the car is worth to get a running engine into it no matter which route you go. For that same money you can simply buy another one that's already running fine and start driving tomorrow instead of weeks from now. There are lots of those cars around, some in very nice well kept condition and they aren't worth a whole lot. When my '03 got wrecked a year ago I had 3 more just like it lined up in a couple of days. A couple of the sellers just wanted them gone and were very flexible on the price. Good luck.