Originally Posted by Kostamojen
Cool to see you back, Kosta!
Jay, 2 days is (I'm 90% sure) referring to the 2.5 swap. Here's what I'd do if I were you; swap the 2.5 shortblock in, and leave your 1.8 heads, ECU, intake manifold, etc. This will increase your compression ratio, you will need to run higher-octane gas, but of course, you will also make more power than a complete EJ251 setup.
The real reason why I'd recommend this setup, though, is because it is cheap and easy. With a couple helping hands, you could do a shortblock swap in a day. There's no wiring, little downtime, and the process is well documented on NASIOC. A EJ251 shortblock should run you around $300.... PM me if you're having trouble finding one.