www.chevythunder.com will have a lot of the info you need. F-bodies (camaros, trans-ams, firebirds) are good donation vehicles. 85-86 intakes will require no modifications to your heads (if you have an earlier sbc), 87-on TPI vehicles require the center 2 holes to be remachined. Later model TPI is less tolerant of wear to engine and modifications than earlier as I understand it. Expect to pay $400+ for a complete system w/ECM and engine harness, more for sensors. Good luck finding one at a wrecker, your best bet would probably be on ebay.