Calvert Split mono springs height

Anyone running the Calvert Split mono's with ride height photos to show?

68 fast back 440, -727
street / strip car
I will be fitting the split Monos with CalTracs.

I am getting mixed messages .
I have been advised by Calvert to buy the stock height 420-35, and if i want to lower i can always fit lowering blocks. Split Mono Leafsprings/pair (420-35) – Calvert Racing, Inc.

On a separate discussion weeks later i am getting told by Calvert , best i go the 420-34
Split Mono Leafsprings/pair (420-34) – Calvert Racing, Inc.

Just wondering if anyone can show me some pics in how their car sits (preferably fastback) and which Split they are using.

Rears will most likely be 275 60 15 and will aim in having them tucked under guards with some relocating hardware if needed.

Thank you with any info / photos