Flat tappet to solid roller...

I get it. You are not into deferred gratification. Do you eat the jelly in the doughnut first? Best of luck.

Its not that bad and also its very easy to say when you don't experience my situation with parts availability. I did not drive the car, just started the motor and let it warm up.
Splicing on just pushed in pushrods was my biggest worry, welding was supposed to minimize the risk of that.
Correct pushrods are ordered and I expect to get them in 2 weeks max. I admit I was tempted and wanted to drive like this but could not, felt wrong.
Also I will do durability test of these welded pushrods to see how big of a risk that really was.