About 250 miles after my cyl head install, I changed to full synthetic oil for high miles engines plus a zinc additive... Supposedly the Chinese cams are soft metal is reason for my using new type oils... My truck stopped using oil after new head install... I hope to retain the original Mikuni carburetor w/ O2 sensor & ECM but an odd varying intermittent miss makes me understand why many folks install the Weber carb...

I watched several YouTube videos about installing a cylinder head USE NEW head bolts..!

Good Luck
George