[shaker455]

[QUOTE=dhcarguy;6384264]

Originally Posted by shaker455

Has your distributor been built for your combo?
Was your carb dialed in with a wideband?
How hot does you car run?.. ever get over 190 degrees?
Are your exhaust crossovers active?[/QUOTE

1- stock dizzy with Pertronix ignition.
2- correct tripower carbs., bigger than stock jets and opened venturi tubes slightly. 1/4" phenolic spacers on all three. Adjusted with vacuum gage.
3-Only runs above 190 when on the highway driving over 60mph. will get to 205degrees. Rear gear is 3:90 with NO overdrive. ,4sp Muncie.
4- crossovers are not blocked.

Car will stay under 190 degrees all day long around town ,even in traffic in 90degree weather.

Is your dist mapped out?
Initial timing
Degrees of Mech advance
amount of vacuum advance and ported or non ported source?
Total timing
Also, I would not exceed .050" on head gasket swap as proper quench will be diminished.
High CR can live on the street but tuning has to be right on
Depending on your pistons a small D-shaped dish can be machined in to get you lower CR and maintain proper quench.