My comp solid roller has .432/.436 lobes, theoretically with my T&D 1.7's and zero lash the lift should be .734/.741". With .018" lash my lift at the retainers was .711/.719", with the lash added back it's .729/.737".

With checking springs or full spring pressure?

I still use Smith Bros, but if I had/have an experience like that I'd have switched too.

Full spring pressure.

BTW this is a Indy headed small block.

That's really really good if it's a 59deg block.

The worst case I've seen with aftermarket rockers was on some TA heads that had HS rockers on them. The rocker stands had been milled off, and they had the blocks around the shafts, along with the offset shafts(iirc) like W2 heads.
Going off memory, they were about 1.46 on the exhaust, 1.45 on the offset rocker intakes...... With checking springs.
With 500lbs open spring pressure they were down around 1.43-1.44.

On the BB ones I've checked, using rockers with the std offset, both Crane and HS seem to have about .5 added ratio built in when checking with soft springs(depending on exactly where you have the adjuster set).
The HS seem so have less deflection and are usually still higher than the advertised ratio even with 600lbs+ open pressure.
I had a set of HS 1.6's on some SR heads...... Checked about 1.67 with soft springs, were still 1.62-1.63 with 700lbs open pressure.

It's a 59*. I mentioned it to Brett in one of our phone conversations and he seemed to think maybe T&D put more ratio in them to offset the losses.

They would have pretty much had to.
You get loss from the pushrods and lifters not being in line with each other.