no one can tell you what to do , but he is saying he wouldnt take the risk on a used system with his engine when the cost difference for the alycontroll PAC is only about 350 bucks
, as for whats alkycontrol alkycontrol.com thats is what i run and regularly run 25+ ( 30+ once) on my stock motor 87 , now running razors kit in my 86 ,
alky is basically a chemical intercooler and an octane improver
by keeping the air charge cool you can get away with more boost and timing , net result is more power if balanced properly , alkycontrol makes getting to this balance much easier.
a larger intercooler (big bucks$$) and tank full of race gas would net same results but for me race gas which would either have to be drained all the time to run 93 for long trips , the residual 93 left in tank also leads to a unpure race mix in the tank so octane isnt as consistent ,the high cost of race gas very time you head for the track (for me thats often) ,fouled o2 sensors from leaded race gas, if you get smogged at inspection you cant run a cat converter for long with race gas and if you choose to remove you have to worry about a spot stop and fines , and the added heat in summer from a frontmount arent things i could liive with ,
i went alkycontrol , kept the stock intercooler and fill up at any gas station , i am happy with the results
read the stickey on tuning with alky at top of forum and read all you can about tuning and get the tools to watch for knock and o2s , nothing that adds power will come without a price , if you mess up it can cost you , buicks need even more attention to avoid knock at all costs and a functioning alky system will help you to do just that on 93 octane
be warned the rest of the car needs to be in good shape before upping boost or its weakness will show