Yes, 35 degrees is safe with those 670 closed chambered heads, but for the best around town drivability they may like 38 degrees total with the vacuum advance disconnected and then 8 degrees of vacuum advance coming in at 1800.
Ruining 38 degrees will Hinge on how the motor cranks when hot, if the motor pings at part throttle it knocks at full throttle which in terms of full throttle is to be avoided 100%!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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