Look, with a blower, nitrous, a turbo or any other serious power adder, you need to do the lower end right. It means taking the engine all the way down, getting forged rods, pistons, etc., etc. There is no such thing as a cheap, dependable blown engine.

$2000 is a great price for a ZZ4. But if you're going to replace everything in the block, you're better off getting a 'yard' motor and starting from scratch.