[Mgs] Mgb engine

[Charley & Peggy Robinson]

Good stuff, Barney;

Just a couple of observations for the OP's benefit.  The 3-main engines 
reportedly revved up better because of less friction in the mains.  
OTOH, the 3-main crank flexed quite a bit under load, hence the 5-main  
was substituted to stiffen the crank.

When I built my last 5-main engine, I compared the weight of the short 
valve lifter/long pushrod  combo to the long lifter/short pushrod combo; 
decided there wasn't all that much difference between them.   I used the 
long lifter/short pushrod combo on the theory that the short pushrods 
would be stiffer; a good thing since I was using dual double valve 
springs.  A thing that moved me to this decision was that I had come by 
a used 18V that didn't have a straight pushrod in it!

One could make a decent argument either way, I suppose.

CR