Hydroboost from Napa/Oreillys

[Nick_R_23]

I’m looking to ditch the vacuum booster on my ‘78 K20 in favor of hydroboost. I already have the new pedal in place. None of the local stores have a hydroboost unit in stock, so hopefully someone here bought one recently and will know this. The pictures they show on their site of the hydroboost units they are selling are “universal pictures” and some show with the rod, and some show without. None show the firewall bracket.

If I go ahead and order one of these units, will it come with the firewall bracket and pedal rod, or will I be junkyard hopping?

Do any other units from the junkyard directly fit, such as 88-98, or 99-07?

What’s the best year to order one for, and are there any differences in the 73-87 units? Appears to be a 81/82 year difference, but not much info on that.

I wouldn’t even mind ordering a new one from one of the online brake places, but I don’t want anything “universal”, or that I have to make fit. I want the OEM setup - bolt in place and connect to the pedal with no drama.