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Old 01-05-2015, 12:09 AM   #103
Ol' Ron
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Join Date: May 2010
Location: Chester Vt
Posts: 7,100
Default Re: 59 AB engine rebuild

Yes, by all means, drill the adjustment holes. Buy a 3/16 long drill at a hardwarre store to make the job easier. Drill the hole just above the oil tube. Make sure you knock the bore off the inside of the lifter boe. I use a wheel cyl hone. Also for those using a hi lift cam, grind of about an 1/8" off the top of the lifter bore, so the wrench will fit..
All this does is to make sure you do more than one flathead
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