Urgent head install question
#1
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You're fine, totally normal for the situation you're describing however I'd pull the plugs out turn the motor at least 760* to make sure there is no binding or anything hitting. Easier to do it now <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
#3
LSxGuy widda 9sec Mustang
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Yes, thats air going past the piston ring gaps. With the spark plugs in you are compressing the air in the cylinders and its escaping past the rings.