I wonder if I should install 4 bolt mains on this x block?
I’ve heard the 2 bolt caps are quite a bit stronger. I believe yellow rose mentioned that. Probably for piece of mind I should.
If you are going to do it (might as well...the caps that go on those blocks are very nice) I'd contact FABO member Rocket and buy all 5 caps from him.
IIRC the R blocks have an updated number 1 cap over the X caps, but I can't say for sure because my X block is in the car.
He has the nice caps and the center 3 have the outboard bolts and they are 1/2 inch not the 3/8 like the other caps.
I always use studs in all the holes and you can do that with those caps because the outboard bolts are vertical and not splayed. The outboard bolts/studs pull on the main web and the filled pan rail and not the outside wall of the block.
