The bosses for those threaded holes are still there on the newer blocks- - - - -just be sure to use a floor-mount drill press to be sure you get the 5/16" diameter holes drilled square with the block before using a 3/8-16 tap to thread the holes. One hole on the passenger's side needs to go all the way through to the fuel pump pushrod bore- - - -putting a long bolt into that hole during a fuel pump change keeps the pushrod from falling out. Just be sure to put the short bolt back into that hole before starting the engine!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!