I just bought it last week and it had the MAF alarm which turned on the check engine light. It also had hard shifts.

I disconnected the battery cable and cleaned the MAF with some CRC. Waited about 20 minutes. Put it all back together and wow what a difference. Much smoother idle and the hard shifts are gone. I think the hard shifts are gone because of disconnecting the battery and having the computer reset but man what a difference.

 

put a good gm brand air filter in front of it to protect it. No aftermarket, oiled, cai cone filters as they do not filter properly.

 

Yeah, it has a GM air filter on it. No need for a CAI as it seems to get plenty of air. I might throw some mufflers on it. I do not want it loud, but the 364 should sound a little meaner. As it is now, at idle I have to check the gauges to make sure its running. That thing is so quiet. It purrs.