You're right, I've stroked the engine and used the original heads. But I've let plan the block and also the heads. I've replaced the original valve shaft seals with ones in this style:
RockAuto
I hope, you've talked about the valve shaft seals...
We will see, what result the test will bring...
I still think better heads will be a consequence, when changing to the EEC-V, E4OD and a Holley HI-RAM-Intake...maybe also the exhaust ports are better constructed like the ones on my 302 factory heads...
I know, that I also may need new exhaust mainfolds...
My aim is to get this car to a perfect dayli driver and also for driving into holidays. So as I get not more than about 1,000 miles per year, I'm hoping to construct a very, very, very durable vehicle, which I can drive for some decades without to have to dive again such deep inside the engine, as I have done by now.
A bit more power and efficiency is something very welcome aside.