87 T TOP GT302

I recently added 24 lb injectors to my 87 GT .The reason was at high rpm 's in first and second gear it felt slugish.With the 24's it pull hard all the way now.Now here is the problem .It idles fine when first start but after it warms it does the usual up ad down idle.I'm going to convert to Mass Air and have been looking on ebay at the computers which seem reasonibaly priced .I know i'm going to have to get the wiring kit and mass air meter for the 24's.My question is has anyone else went through ebay with the computers ?I'm figuring that's pretty much the only way to get one unless i'm going to pay an arm and leg.

mjr46

buy a used a9l, got one off craigs list a few years ago and worked fine