Torsion Bars

I realize there's a very recent torsion bar thread, but I do not want to bogger up his thread with my questions, so here is my thread.

64 Valiant slant six. I have a Addco 1 1/8" front sway bar installed now. I will have a 7/8 rear bar installed before long.That MAY prove too much and if it is, I'll snatch it off. We'll see. I have new regular replacement gas shocks all the way around. However, hitting bumps and low spots in the road, the front end does bounce more than I like. I am certain the factory torsion bars are about shot.

That said, Do yall think the PST 1.03 bars would be overkill? As most of yall know, I have a 400 swap planned. Although it may not come to fruition, I want some bars that can handle it too and I feel sure they can.

So what do yall think? Thank you for any and all advice.
I have 1.03 bars in my 69 Swinger, combined with Hellwig front sway bar and Billstein shocks on all corners. Rear springs are reproduction 383 GTS spring that have a slightly higher rate than factory 340 springs. In my opinion it handles great, it is not harsh at all but is firm. The car now corners very flat with little body roll. The tires are definitely the weak link in the corners. My steering box is a fast ratio Flaming River manual box. Overall I am very pleased with the results. I still have the Hellwig rear sway bar in the box I have yet to install.

Not sure I answered your question exactly, also I'm not sure of the weight difference of a small block vs slant 6.