Find a 4g64 wideblock and put the 4g63 heads on it and you have 6 more c.i., better torque, and should be able to make an easy 300hp with the right turbo setup and MSpnp.

Then sell the 4g63 short block and recoup some bucks.

The dohc 4g4 should handle 15psi on pump gas with the nice combustion chambers and 4v heads. I hear the gen1 heads flow better, and it seems you need the 6bolt block for best results. There are some water circulation mods you need to clear the firewall.

See projectzerog.com for all the skinny

Not responsible for advice not taken...