It is usually better to let a pro do porting, but the stocl lower is so ripe for improvement it would be hard to screw up. If you use a good internal snap guage or internal calipers set combined with an exxternal caliper set to keep track of wall thickness and aim to equalize the runner cross section (internal runner size), it's hard to go too wrong - unless you get carried away and do not measure as you go - follow my instructions and you should be OK.
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Tom (Torque) Moss
88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE).
http://www.fastlanecars.com/
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