Got my first small production run of my 6r to sbf adapters a couple days ago. They are looking good. Have one tweak to do. The dowel pins are tight and the starter location alignment looks perfect.
I mocked them up with my 6r and sb and looks good.
Here's a different issue...
The Meziere flexplate I bought to solve the cracking/grenading issue has a different mounting location for where the converter mounts on the flexplate. The offset between the crank and the mounting pad holes is greater. It mounts the flexplate appr (typo) .125" CLOSER (more offset) towards the engine than the other two flexplates I've been using (because of the offset on the flexplate).
What this does is not leave any clearance for the converter to slide foward when bolted up. The converter makes contact with the Miziere flexplate before the block and bellhousing make contact. I swapped and put one of the other two flexplates I've used back in and it has almost .100" clearance when the trans and block are torqued together. What this major difference between offsets does is not only does it mess my install all up but if you want to recommend a product to someone then ALL the parts should fit-
Why does Ford have different offsets on converters to screw us up when swapping flexplate brands????
This happened on my 4r70 build a decade ago also. Same listed "fitment" for cars/engines/trannys and yet only one of the 3 converters I tried had the correct offset so the billet converter would fit the flexplate and not bind when the block & trans are bolted together - yet the books said all 3 would fit in this case.
Not sure what I'm doing now for a flexplate. Order in one of every brand, hope one fits and hope it's stout enough so it won't eventually crack/grenade like the others!
The straight edge pic is to show the distance between the face of the ring gear teeth and the surface that the converter mounts to. Easy 1/8" or more difference which moves the converter fwd or back so it fits or doesn't fit.
Meziere crank mounting face to converter mounting face is .780" (confirmed with Meziere today). 2 of my Perf Auto flexplates have appr. .650" mounting face to mting face. There's the space I need.