i haven't installed one yet but most of the guys are getting like 5rwhp, it mostly helps the engins rev quicker. to install you have to take the ac compressor bolts out and move it aside a little, than unplug the ckp sensor and bolt it in there. i believe it comes with directions

yes you can use it with a blower, but typically you don't want advanced timing in a blower car, it would be good for a pinging problem on blower car because you could retard the timing.
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96 stang,ported 99 heads, 99 intake, 99 cams,Steeda power pullies,Kirban adj.reg.,Pro-m 87,24#inj.,70mm t/b,BBK longtube headers,Bassani x-pipe w/cats, Dynomax ultraflow catback,iat mod, home depot ram air, k@n,373's,cobra brakes,fms spings, tri-ax shifter.
best et 13.80
best mph 103.3
bfg street tires,bakersfield, ca