I was able to source a single replacement head for the cracked one thanks to a VERY helpful member here on the board. He has been a huge help to me throughout this project and I don’t know how to thank him enough. I won’t name him but he’s free to take a bow if he chooses.
As for the cracked head, I used a small dremel bit to grind a small groove over the cracks and cleaned the casting the best I could. Then I handed it over to my brother and he attempted to tig weld it using EZ-Rod which is supposed to be the ticket for welding cast. Well, after he ran the first bead, the crack reappeared right in the center of the weld bead, almost like the crack just rose to the top of the weld. So, no bueno.
I’m going to give it one more shot with the welding but this time I’m going to heat the head in the oven before I weld the crack one zap at a time and with my MIG then back into the oven for cool down. IF that doesn’t crack, I’ll then pour a little epoxy into the water jacket in the corner where the crack is and stand it on end in an attempt to seal it from the inside. If that all fails, it’s getting thrown off the highest bridge I can find and focus on getting the replacement head prepared. It’s going to need a lot of machining and porting to make it work.
At this point I really regret going down the W2 rabbit hole. It’s gonna take a long time and a lot of 11 sec time slips for me to get over this hassle.