Well not very many miles since the repair... about 100 or so... and it is still doing OK. I am towing in may or June sometime so I will see if anything happens then...
I am going to reinforce the areas that are NOT crcked yet with the JB. use a wire wheel to take the paint off then JB it..... I am told by a Heavy line mechanic for a trucking company where I work, that JB has a very high shear strength and it bonds very well to clean, bare metel.
So, If the JB aids in the shear strength by bridging the radius curve, I see no reason not to do it. I mean if it helps it not to crack by thickening the metal there, then it wont leak and there will be no need to worry.
I have too much money in this truck on modifications to just throw another 3 grand for a block or just to get a new truck for that matter..... If this repair holds for several years or longer, then I am ahead $2500... If it does develop a leak, then I will grind, use the stitch pins again, and JB weld again..... Since I have leftover pins, that repair will be free save for the new JB container.
Thanks again to all who helped with advice and the criticism, I hope that if you do have a crack, do this repair, it works. The Instructions on the DVD said that if it were to develop a leak, then you drill and pin that place..... seemed to be a no problem thing... . i mean if they are repairing heads and valve seats with this repair, I think a little water preassure and slight heat will be OK for it.