Re: 305 Question about valves
The 305 is a non-interference motor. I have measured the valve clearance on a stock 305 head and a magnum head. On the 305 with a valve lift of approximately .450" (valve wide open) lift it will still have a minimum of .150" clearance (piston at top dead center). On the magnum head with a valve lift of approximately .450" (valve wide open) lift it will still have a minimum of .120" clearance (piston at top dead center). Hope this help.
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