Actually Ross, taking a closer look at things, I think the problem may be not the depth of thread in the block which seems about right for the 154-4203s. Depth of hole 1 9/16", threaded length of stud 1 7/16". They snug down on the unthreaded stud shoulder not on the bottom of the hole, so I think if you machine the ends of the studs down as Dart suggest you will not do anything except reduce the number of engaged threads.
It would appear the length difference that I am experiencing is probably due to a thicker boss on the outer (exhaust) side of the Brodix heads and this is why I had to space the outer studs up. Not withstanding that the Brodix blurb specifys the 154-4203 studs. Can't measure the boss heights right now because my heads are still at the machine shop.
It would appear the length difference that I am experiencing is probably due to a thicker boss on the outer (exhaust) side of the Brodix heads and this is why I had to space the outer studs up. Not withstanding that the Brodix blurb specifys the 154-4203 studs. Can't measure the boss heights right now because my heads are still at the machine shop.
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