a few intake questions
1. what are the brass sleeves in the mounting bolt hole?
2. what size freeze plug can be used to fill EGR hole on manifold?
3. Which TB is better the ls1's of the lm7's ?
http://www.ebay.com/itm/Camaro-Firebird-LS1-Billet-Aluminum-EGR-Intake-Block-Off-Plate-/310975269114?pt=Motors_Car_Truck_Parts_Accessories&hash=item48679208fa&vxp=mtr#ht_303wt_867
Attachment 724171
For the EGR, the freeze plug to use is the Dorman 555-093 which is 35mm which fits nice and snug in the 34.9mm hole. I also glued mine in place and made a retainer plate out of scrap aluminum held in place using the bolt hole in the intake.

