I've had econo 810's in front of me that were rough cast on the shallow side of the chamber like a factory head.
Are yours machined looking like OP's and if so are they 1 st gen or what yr? Did op mill his stands off, cause econos have stands.
I have a set of early 810’s in the shop, and they have the cast pad.
I *think* it was when the W2 was re-introduced I whatever year that was (I had the chance to buy bare W2’s for 99 bucks each, and my dad and I talked each other out of buying any because we thought the new heads coming out would be all that much better...Yup...I’m that dumb) and again, IIRC that’s when they started machining the pad rather than casting it.
Also...just thinking about it...that was the same time they released the closed chamber W2, and they used the same casting for the OC head and that was another reason they just machined it.
My memory is sketchy on this stuff, but I *think* that is pretty close.
