for 200 hp you will be more than fine with a felpro headgasket. i didnt do arp's but thats because i didnt know stock head studs were TTY when i did my rebuild or i would have. on 6 or 7 pounds i dont think you need them. if all youre going to use is an afc, pull 3 or 4 degrees of timing at the distributor. if you dont know much about tuning, dont worry about getting a wideband, just take it to XAT. if youre going to tune yourself, get a wideband.