I have a pair of Swirl Port 318 heads for sale. Came off a running 318. 200.00 for the pair or offer. I will ship on your dime or if you are local to the Zanesville Ohio area, I can meet you.
They have the 1.78/1.50 valves. They can be used as is. My only thought since valve stem seals are cheap go ahead and replace them while the heads are off.
