hi daryl, i had a cam in my u-20 eng. with .620 lift. i had to
remove the valve seals to prevent the retainer from hitting anything.
i was prepared to machine some off of the bottom of the retainer,
if need be, but didnt need that. i didnt notice any excess smoking or
oil consumption(no more than is normal). my valve guides were in
good shape, fairly new, but not brand new. hope this helps.
bob smith
69 srl 311
70 chev elcamino ss> From:
drlsmith@dccnet.com> To: datsun-roadsters@autox.team.net> Date: Thu, 21 Aug
2008 11:34:42 -0700> Subject: [Roadsters] R16 - How to get .425" Valve lift?>
> No answers to the last question so let me put it another way......> > How do
I get .425" Valve lift on an aluminum R16 head.> I had a cam with .387" lift
which crushed the seals (exhaust only) and wanted> to increase the lift if I
could without too much difficulty.> > > Anyone have any tips on whats
involved? Any way to do it without custom made> parts?> > Any advice
appreciated!!> > Daryl> ________________________________________> Support
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