Also the recommendation to drill holes in the valley is very controversial.
I have had the Eichmann book for close on 20 years and did indeed drill the valley as he suggests in the book. The reasons he stated were pretty valid (I thought at the time) - The lifters only get get splash fed from the sump and piston squirt holes.
The engine has been going strong for over 15 years with absolutely no problems. 292, .040 oversize bore, .010 oversize crank, warm cam, about 270 adv. duration and pretty extensive head work coupled to a 3 speed toploader. It was only recently replaced as I wanted a fresher and less fumey engine.
I do change the oil every six months, regardless of mileage.
Back in the day when I bought Y Block book, the only manual available here in OZ was a pretty nasty and basic aftermarket workshop manual put out by Gregorys. (This was long out of print at the time but was able to picked up at markets and boot sales used and generally very grubby)
With the internet though it is now much easier to get hold of manuals on disc from several US sources which make the Y Book book less valuable. I do still however, think the book makes great reading and has good information when the computer is not to hand.
Regards
Rick - West Australia
Do Y Blocks Downunder run upside down? Gravity Sucks!!