LR> The thermostat is a 195 degree version.
 JG> Does the temperature rize normally when first cold to a normal
 JG> reading? If you have no gauge then drive around for awhile, stop and
The Thermostat works just fine. Idling in the driveway it takes about 15 
minutes for the 350 to warm up and then it stays right around 195 on an
average day. On warmer (hotter!) days it runs hotter.
 LR> The jets as far as I know are
 LR> the original jets that the carb came with. I bought the car used so I
 LR> have no idea.
 JG> Did it ever run for you without these symptoms?  If you bought it
 JG> used it's possible it's the wrong carb or ???  Make sure the carb is a
 JG> correct model for your vehicle.  It's probably not the problem.
The engine run just fine until near the end of summer. I could mash the
throttle and let it ride for miles without it sputtering or anything.
 JG> Is there carb preheat on this vehicle, i.e., a channel for exhaust
 JG> gas to travel up to the base of the carbureator?  If there is, 
 JG> and it's plugged, then clean out the passages in the manifold with
 JG> a piece of coat hanger wire.  If it's got a custom intake manifold
 JG> rather than the original ???
 
It's the same manifold I used with the above responce. I havn't checked
those holes in some time, they probably do need cleaning.
 JG> Did you change plugs for one's with a colder tip?
 
 LR> I changed the plugs from Autolite 145's to Autolite 25's. I'm
 LR> considering going with AC R43T's.
 JG> Use hot plugs rather than cold ones.  In most plugs the number
 JG> increases with the tip temperature, e.g., for AC, 44 is a cold plug
 JG> 45 average, and 46 hot.  Try the hot ones and see if your problem
 JG> goes away.  Drive for 5000 miles then pull the plugs and look at
I will try the # 46's. My guess is that the plugs are overheating with the
engine at a full load and setting the fuel off.
... Catch the Blue Wave!
--- Blue Wave v2.12 [NR]
---------------