.030" longer push rods and where to find them.

The thing a lot of people don’t take into account when using some factory stuff, mixed in with non-factory stuff, is....... the factory stuff all had a fair amount of engineering time spent on it, and has been durability tested to provide trouble free service for many miles........ when used with all the companion factory parts.

You start throwing in a mix of aftermarket stuff....... you’ve changed the recipe.
There is no guarantee the new parts are going to be equally compatible and reliable as the factory stuff.

My suggestion would be to put a want ad on a few forums and see if you can come up with a set of decent factory hold downs and spacers.
I ordered the new factory style hold downs and spacers from 440 source so hope it works.