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Old 03-15-2020, 10:49 AM   #5
Jim Brierley
Senior Member
Join Date: Jun 2010
Location: Temecula, CA
Posts: 3,482
Default Re: GAZ intake valve

lsr490, Big valves may not be worth the trouble, I've run mostly stock size valves for many years, and done well with them on hill climbs, etc. Having said that, the heavier block indicates to me that you should have no problems with 1.7". Blocks are thick at the top surface, putting valves in using a 70 degree cutter means not so much is taken out of the port.
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