Well I bought this 88 burb. It's the cleanest in Atlanta. 71k on the clock when I bought it. I paid $5k for it and I still think it was worth it. Well The previous owner did his own maintance. Had this incredible list of when things were done and when they were due next. Spent 30 minutes explaining this maintance chart. Let me know it was due for the front wheel bearings to be repacked. All recitps etc. I'll tank it up in the morning and see what the MPG was. I'll post what it is in a couple days when I run it down to half a tank and see how much of an improvment it gets. I know the Speedo is of 5mph so I'll use it as a base base and Use my GPS to track REAL miles traveled and figure out what it really gets. This truck didn't have 1000 miles put on it in the last year plus. SO age was catching up to a lot of things. I'm playing catch up now. Heater hoses originals, Getting ready to go and had to replace. NO tranny cooler. This is a 454 with a TH400 and a 16k combined GVWR ! and GM didn't put a AUX cooler on it. So last week it got a stact plate installed rated 10k pulling on a MOTOR home LOL. Upper radiator hose was improperly installed and got into the A/C fan belt. Bad radio antenna. Dry rotted speakers. Original Shocks ($200+ worth of Bilsteins going on Tomorrow if I have time and it's not raining. Just a bunch of dumb age stuff. Well It has a serge at cruise seems to do fine acclerating but not at cruise. Replaced the O2 sensor last week. Decided to give it a tune up today. one of the plug wires was getting rubbed by the shift linkage. So I carfully mark the wires so I can set up the new cap and wires on the bench. Pulled it all off in one shot. Look at the cap and there is scaley corrosion from repeated steam cleanings on the contacts. Decide to check the wires. FOUR BAD WIRES including tow that were open as in no connection for end to end LOL. one of the worst wires was on number 7 and that plug was not looking good from lack of a good spark. That';s the same side as the O2 sensor so I'm pretty confident I have my serge licked. Didn't get a chance to test drive it tonight but my 22 mile ride to work in the morning will tell the tale. Idled much better that's for sure. No matter how good that new truck appears to be spend some time and check things out. The Previous owner was a great guy and took care of this truck WAY better then most but still some stuff needed attention.