727 Build for Mid-10s

As the title suggests, I'm beginning to gather parts for a 727 build for my street strip 66 Dart. The engine will be a 470-512 low deck stroker (undecided on CI), but shooting for 600-650 hp. The car will run mid-10s in street trim.

So far, I'm considering a reverse manual valve body w/ LBA, bolt in sprag, billet rear servo, blocking 'load control' hole on front servo, 4.2 kickdown lever, w/ hd band strut, accumulator blocker rod, rebuild kit with new clutches, steels, and bands.

My question is, what parts would you upgrade in the 727, if any, for this type of build, or any other modifications would you make? I realize a stock 727 may work fine for some time, but I'd like to build it once and know it'll last with no issues.

Thanks!
check out the 727 build thread @younggun2.0 did for his 470.