Stroker kit not clearing

'morning,

I bought a 383 stroker kit for my SBC and was under the impression it was designed to not have clearance issues. It does. Maybe what the shop meant was rod to cam?

Looking into this, it is very unlikely, unless some very expensive kit, that at least the block does not need grinding. I was also sold 6" rods, but unlike what people say, they actually clear the bottom of the bores by a large margin.

How can I check the clearance between the big-end shoulder and cam? I can barely see in there with the rod fitted and I would need to know the position of the cam at the correct rotation.

Right, well, I need to mark the impact locations, take everything apart and, somehow, grind a bit off without digging into a water jacket. Very, very annoying considering I have spent three months (at least?!) assembling this and wasting assembly lube and other things.

Any tips? I'm also worried that I will grind at the wrong angle compared to the actual rod bolt direction.

Thanks

Another question is, how much clearance? My book says 0.020", but the great Internet says 0.060-0.080".

There are many guides on the web for this, and how much needs to be removed will depend on the connecting rods you chose. there is little change with RPM and temperature, so 20 thou' should be enough, in theory, but 40-60 thou' will give peace of mind.

Take your time, checking as you go, and you should be fine.

It's actually not the bolt but the collar around it that hits. Why have they made this collar, doesn't seem to have any purpose.

My best guess is that the rods were disigned like that to increase the bolt head clearance while minimising the weakening of the cap from the material removal? [edit] Come to think on it, the short 5.565"(?) rods used on the 400 engine had shorter bolts and notches for clearance, this may be an effort to do somthing similar while keeping a little bit more material there. What brand are they?

I've never seen that done before, but been out of it for quite a few years. Do they state a maximum rpm for the rods?

They are Scat 6.0" stroker rods. Scat possibly suggests it is occasionally safe to go to 6500rpm.