heat isolator?

[RAT-AT-TACH]

i just had my burb tuned up yester day ,and she started pinging,i took it back today and the mec put the timing light on it and brought it in a touch,then he tested the temp in my float bowl(edelbrock ps 800) which was at 110-115 he said it should be no more than 85, so im just burning my fuel into vapor at such a high temp,im going to be putting a heat isolator on the carb tomorro to keep it cool then he will be able to tune the timing in better.
does this sound right to anyone?

i should mention the motor is a modified 402 bb .