Valve adjustment

Tadams,
For what its worth My 3'rd 273 build (circa 1972) racing the OMG BIG BLOCK bad asses :D
Street & Track driven 273, --- oil and water cooling system modifications ---
.008 intake , .016 exhaust, worked very well :)
Untill the 'knock' started ? wth ? --- Crack through #3 main saddle :eek:

Apologies I digress Tadams,
Stock 273 Commando Engine try .008 INT & .013 EXH. IF THERE IS A TEMP ISSUE increase the Intake
to .011
:D:D