At 18PSI, you'll need a stronger block as well. Esslinger makes just about everything for our engine, but it is pricey. No reason to pay to have cam gears tuned ($50-$100 per hour) untill you get cams. I would expect a 15+HP gain with both.
Frank McCoy aka Mod-deth aka Mid Life Crisis aka SVT Doood aka mcgainer is a SCAM ARTIST
Pre98 Zetec - Some Mods