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Discussion Starter #1
I am building a 90 model roller 5.0 and wish to use what I have except for a different cam.I want to use my 69- 351w heads.I want to use the speed pro flatops I already have with 4 valve reliefs in them. Has anybody used this setup on the street? Any idea what is the max lift and duration that will work with 1.94 and 1.60 valves in the Windsor heads?

Thanks for any tech help.
 
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