I have a 95 camaro and i am putting pace setters headers on, and i was woundering should i buy the 3/4" stage 8 header bolts or the 1". Also i have to extend the o2s can i cut them and extend them.

 

1", but stage 8 why bother, just get a small head style. You still have to retorque after a couple heat cycles. Once the gaskets are fully compressed they will not loosen.

Buy extension harnesses, or get the 'vette O2s which have longer wires... and a better heater for more rapid cold start feedback.