JohnnyK

Installing some Tri-Y headers onto my 67 engine (That has an 88 EFI 5.0 in it) and am wondering where i can install the o2 sensors. I would rather install them onto the collectors after the tri-y headers (These are full length btw) but if thats a bad idea, then I will drill/weld the actual header. The collectors are pretty far back.. halfway on the T5 I would say. Is that too far? Will it read wrong? I read somewhere that if i weld them really far back to use a different part # o2 sensor, but I can't find the site.. So yeah, any ideas are appreciated (prefereably, the been there, done that ideas). Thanks