1978 L48 head casting numbers

[1978L48jafo]

Hey all
I am in the middle of an engine rebuild and I am following a manual from northern called "How to build the Small Block Chevrolet" I am porting and polishing the head with the kit that's available and I notice a warning in the book about casting number 624 or 462624. The book recommends scrapping and not wasting money on rebuilding because this particular casting is prone to cracking. figure the odds!! can any of you motor head types confirm this???
Help
Jafo

 

[Stingray6974]

The head casting number is on the top of the head under the valve cover. 624 will be the last 3 digits. And yes those heads will crack if you stare at them too hard.

Mike

 

[1978L48jafo]

Lucky me, I had no trouble finding the casting # I was just hoping the book was wrong. I don't see any cracks and I have been cleaning for several evenings. Sure wish I had read that paragraph a few days ago.

Anyone have and experience with the 58cc heads?
thanks Mike!!

 

[1978L48jafo]

Replacement heads

Can anyone tell me if (58cc) heads, casting number 14014416 will have any issues with the bolt on accessories on a 1978? I don't want to waste any more time and effort on my old set.
:confused
Thanks Jafo