Honda/Acura says it's an 16-18hr job back in the day. That being said the cars 28years old now and the bolts don't come out so easy especially the Egr, PAIR pipe and the exhaust manifolds. And all of that is right up on the firewall and strut towers as the engine is a v6 mounted like a rwd powerplant so they shoe horned it in there lol.
I'll be doing a few upgrade odds and ends while I'm in their as well as all the top end gaskets, water pump, timing belt etc. I'm in no rush don't want to be doing this again anytime soon.