Yes, please do. Whatever it takes, I will wait patiently. If I was closer I would offer up grunt work to help out. I have wondered the same thing "what is a 390 good to with low rpms and a lot of boost?" I have dreams of building up my 64 comet and using turbo'd low buck 390's.

About the block layout, good to know. If Shoe was around I would ask him for more detail. I wonder if the casting is too thin in the critical areas that the twisting motion shows up as the first failure mode.

Jay take a look at the data sheet or owners manual that came with the wrench if you can find it. Most torque wrenchs lose accuracy at the lower and upper ends. Most torque wrenches accuracy is around +/- 4-6%, however they go up to +/- 10-15% at the upper and lower 10-15% range of the scale. So depending on the wrench you may be way off when using the lowest or highest settings. Here at work we aim to use our wrenches in the midrange for the best accuracy. This of course all depends on the manufacture of the wrench and what they specify.