The trap of the industrial / motorhome 318-3

In another new addition to the thread, I’ve started tearing down a set of low mileage original 2973 234 LA industrial heads from probably a -2 318. Actually, the same heads pictured by SS Lancer that he and I traded around on a while back ago. Big high flow water pump and head crossover but cast crank bottom end. I thought I was going to get by easily with some stainless engine pro 1.78 Jeep valves and some bronze liners on the intake and for a little bit more add some new guides and 11/32 stem Chevy valves on the exhaust. I was not planning on increasing valve size. Only upgrading to nail head valves bowl, seat, and chamber cuts and from my machinist along with a .025 cut and touching up the port and bowl finish. It turns out that the intake valves measure 1.82 inches and the exhaust are 1.53 inches. I thought it strange that there would be valve sizes this close to the 1.78/1.50 valves. The seat widths are .130 on the exhaust side and .110 on the intake. I thought about continuing the plan and step them on up to 1.88 on the intake and 1.60 exhaust, but after porting to make the larger valves work, I’d be much better off putting that $$$ into one of the sets of 974s I’ve got laying around…