I'm wondering about the benefit of a performance chip on a 85 TPI. I've read that the 85's ECM has less memory than later models, and that aftermarket generic chip ( Hypertech , Jet, etc ) gains are minimal over stock GM chip on these. Is this so? Also wondering on this model if Hypertech Thermomaster, with a cooler t-stadt will give power you will FEEL, or should I look to a custom burned and are they REALLY worth the $$$? I understand TPIS supposedly has high quality custom burned chips. Has anyone tried one of theirs or any other custom burned chip and was it worth it? Also, where should base timing be set with these for max benefit? My ride is basically stock with the usual free/ low cost mods,etc.....Thanks all!