1) There is NO MORE EXPENSIVE place to buy "special tools" then from Kent-Moore. Even GM dealers hate the prices. Kent-Moore is just an arm of OTC, and "makes" NO tools. They are either rebranded OTC stuff, or vended from tool companies. Do some Google searching for the above vacuum system and expect to pay about HALF the K-M price.
2) There is an "old school" solution to cooling system air locks. Remove the thermostat, drill a 1/8" hole in the plate, and reinstall. No more air locks. Have I tested it on an LNF engine? No. But it is an almost universal "fix". The hole is big enough to clear air locks, but small enough NOT the negatively effect the cooling system.
Redline (pre-halt), Pearl, Black/Red
complete option list except auto, 3" MF cat-back,
painted calipers, owner installed power lock buttons, muc uprated springs, S.P. downpipe, Wester's tune