Dana,
Here is a link to the factory shop manual adjustment procedure for a 235
with hydraulic lifters.
http://www.strato.net/~jrdorsey/lifter/hyd_page3.jpg
I scanned it a while back for someone else. It's from a 1955 car shop
manual but it works the same. No special tool just a box wrench and
screwdriver. It worked just fine on the '57 235 in my panel truck.
--
John Dorsey
Wauchula FL
http://www.strato.net/~jrdorsey
'49 3800 Chevy Panel
'52 640 GMC Firetruck
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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