Solid roller lifters

famous bob said
setting at stop lights w/ 90-100 degree heat, idling, is a lot diff. than high rpm w/ a lot of oil splash for short periods of time, w/ a non direct feed lifter. 829-16`s are not direct feed.

I'm answering the OP's question. It is the reason I asked about the load and service he was subjecting the lifters to. It is a relatively light load in a race environment, 829's will work well.

dartlove said
Around 550 open . Strictly race. That is also only a few races a season. If the math is correct around 720hp. 13:1 comp

Nothing about cruzin' to the Dairy Queen there. I stand by my recommendation.