Looking for a "big" solid roller cam for a back-up engine, while the other engine is in machine shop jail. Anyone have a new or used cam on the shelf they don't need? Thanks.

I was curious what the Shelby cylinder sleeves OD are, for the "standard bore" and the "big bore" blocks as delivered new. Sleeve thickness as delivered for both and/or what the as delivered ID is for the big bore option. I imagine it is somewhere around 4.365 - 4.370? I haven't seen anywhere what the max overbore is for either size either. I know Jay has bored and even changed sleeves so maybe you might have the dimensions??? Thanks.

On the new BBM aluminum block, there are un-machined "bosses" in the valley, above and on both sides of the 3 center cam bearing bores. This was for retaining the cam bearings inside the cam bores. Has anyone used this feature? They are blank and un-drilled/tapped. I imagine that is what the thinking behind it was, drill & tap and a set screw of some kind. I would think it could be a benefit, but looks like a pain to try and do correctly. It would be hard to get the depth and location exactly right, to lock the bearing in... but still have clearance for the cam journal to install the cam!

Anyone tackled this, or do you just use green loctite on the bearings or what? I am a little gun-shy as the cam bores measure on the high side already, I do not want any issues with cam bearings moving around or fore/aft... and taking out the short block. I have heard of this happening, not on an FE or the BBM in particular, but on any aluminum block.