i run Caltracs with Mopar XHD springs , have done for over 10 years and various power upgrades .
From footbrake to transbrake leaving @4500 and currently back to foot brake .
I would like to try split monos , weight reduction and probably stiffer . BUT i am concerned how they will hold up to daily driver , probably ok , and when i go racing i have rear race wheels , 29.5x10.5R15 PBR , trolley jack , 20L fuel , spare tyre and assorted tools etc in the boot , not sure .
Tex I got my -1" ride height Caltrac Split Mono's in 2000, I got bored waiting for them to "settle" so in 2016 I welded on some 1" lowering pads  . I don't think you will have a problem 
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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