Up until a cpl months ago, I would have assumed that the 426 was no different than any other BB Mopar. Pick a converter, 727 and bolt it together.

But wait, the Hemi has 8 bolt crank flange and larger crank bolts. So non of my flex plates fit. So now get an 8 bolt flex plate, then bolt a converter on and go.

But wait, 7/16 converter bolts.

This is where I am now. is there anything else to this that I'm still missing and am going to find out bit by bit lol

I've searched and read that Hemi converters are "dimpled" to clear crank bolt heads, but all my converters are dimpled in that area to some extent.

Bottom line;

I have a 727 that was built with stage 2 shift kit some years ago and 3500 stall converter. (10 x 5/16). Had this behind a 450hp 383 and worked well even with 3.54 gears.

1. Can you use any BB 727 behind a 426 Hemi? (or is there more info I'm missing, like the 3 different ring gear sizes I read which made no sense for 68-71 anyways)

2. Did the Hemi come with both 10 and 11" converter bolt patterns or only 1? (I've only read they were 10x 7/16 so far)

3. Can I assume with 8bolt Hemi flex plate, all I need do is drill and tap 3500 stall converter for 7/16 bolts and go? Also keeping in mind crank bolt head clearances.

I do have a Saturday Night special new in box as well, but it's much lower stall and 11 x 5/16 pattern.

Help!