Hi Billy, that's a pretty big jump in #/inch.

.810 = 90 #/in
.890 = 130 #/in from the mp chassis book.
.850 (318) bars is not listed in the chassis book. .20" in diameter goes up 10 #/in so I figure mine are 110 #/in

Years ago I wanted new bars in my Barracuda I got the .890 (resto 383) I did not like em! I sold them and got .850 (318) bars, swap meet.

I didn't get the load transfer I needed with the .890 bars. That was with my 451 ci 660 HP.

I have a BB and when I used the .810 drag bars they barely held up the front. sold them also.

Let us know how they work. Yours is a street car while mine is drag only.
Do you feel older?

Don