if I get longtubes without this for my TPI (heddmans 1-5/8s) should I just buy one out of the summit cataloge and cut the hole with a hole saw?
do I need to use special weld that will hold up to exhaust temps?
where should I place it -- close to the primaries or the collector?
is there a difference in the fitting for a heated one vs. a non heated O2?

thanks

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88 WS6 T/A 305 TPI--
K&N,Air foil,hypertech chip, thermostat+fanswitch
free mods, dynomax catback, urethane motor+trans mounts, PST front end poly stuff, Earl's hyperflex brake lines SSM SFCs, Bilsteins very trick homemade ramair, Accel 300+ ignition system. Ported plenum, intake and heads with 1.94I valves.
Planning: Heddman 1-5/8 longtubes, NOS 150 plate, replace the "peanut"! and Eibach Sportlines.
check it out at:
http://www.geocities.com/transam617