I am looking to equip my new aluminum head on shaft mount roller rocker.
I want some advise and preference before buying between T&D Machine vs Jessel shaft mont rocker kit.

Run the Crower Stainless steel stuff. Holds up better. Or use the Steel stuf even better.

Crower Stainless shaft rockers

Crower Stainless shaft rockers had them on my dart pro1 heads they were to small. . i went with jessels. i like the crowers but the set i had were for stock heads. my engine builder told me the jessel will be better so far my motor is running good. so just make shore when you buy your new rockers tell them what heads you are useing

We've used Jesel for many years on our road race engines with zero problems, Daytona 24 hour, World Challenge, Grand Am, blah blah. I don't have any experience with T&D.

I used TD and opted for steel rocker with built in spring oilers with zero problems @ 6400rpms

The T&D I've run need something rebuilt every season. The rockers keep breaking on my brother's Jesel set up.

What spring rate and how much lift to get problem with them?

What did you need to rebuilt every season on the T&D?

They are both solid roller application, both cams around .750 lift. The T&D was bearing issues, Crower 68848 springs high pressure, but supposed to be built for them. The Jesels were run with Crower 68806 springs, from memory 265 @ seat 725 open. I don't think either product could be considered bad, I just think stainless is stronger, they both may sell the stainless set ups now, no clue how their pricing compares to Crower.

Ran jesel on my 9000 rpm 522 bbc in my mud racing days. Zero issues.