Not sure how this will go

Hi me again, sorry for the absence but life just seems to get in the way.
Still not got any photos to share as yet but will do soon honest.

Anyway, I was cleaning the block up and ended up down a rabbit hole and ground all the block as smooth as I could for painting purposes and in doing so I got crap in the bores so decided to remove the cylinder heads and that is when I got a bit of a shock. The previous owner had the engine rebuilt some years ago and had only done about 1000 miles on it, I know this to be true as I know the owner well and the Jensen he had (now broken up and all sold off), however, I am not impressed with the engine builder, every gasket was installed with instant gasket material, he had reused the old pistons, which are passable but there is a ridge at the top of the bore and no visible cross hatching from any honing works but the worst bit is the very very pitted exhaust valves, I tried lapping them in but they are too far gone, the inlets are fine, I also believe that the original cam has been reused but with new lifters. For me an engine rebuild would be cleaned, honed, new rings, new bearings, replaced valves as required and clean new gaskets, so not greatly impressed but relieved that I have found this out now before putting it into the vehicle.
So next I went looking for Jensen 383 exhaust valves, looked over here in the uk but not found anything, then went on Rockauto and under Jensen 383 they do not have any exhaust valves!!! So went back on under Plymouth Barracuda 383 and they had a variety but a couple of different sizes so my question is are all 383ci 906 heads the same no matter what application? My heads look to be dated as Jan 1968 if I am interpreting the casting marks correctly.
Once I get the valves sorted I will be reassembling the engine, giving it a coat of primer and a couple of coats of 2k black paint so I can eventually get the engine and box bolted back up together and back in the chassis, will have photos of that for sure.