Porting a 4 Banger

I´d like to see some pictures about porting 4 banger block, if some one have?
I haven´t find any good instructions anywhere...Need some reference for a Crosley engine that has Siamese intake ports.

 

Check Antique Engine rebuilding for valves they have new modern style valves the correct length with new springs keepers and retainers both stock and 1.730 oversized intakes and seats, only use the oversized intakes in a Model A block if you try on a B block you will go into the water jacket

 

Are these pictures of an A or B block about how far did you cut the deck to get to this point