I'd point out for people here that there's nothin' wrong with the 1100S blocks and that hole. People in Oz have raced and revved the nuts off them for years, and still are. They also bore out better than A+ blocks.
So.... just don't take
ALL of Vizard's musings as gospel..
If there's no hole (as on LS) the metal there's about 2mm thick max, less if you bore it out... and grey cast iron has bugger all tensile strength anyhow.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
OMG how rude!! They are devon slicers thank you very much! 
