Lithium is making 300rwkw on a stock manifold with a 3076 .82 internally gated on a 200,000km motor.
Seems to work for him, and drives as smoothly as my 77,000km motor.
He had one of those exact manifolds on his for a while. I think he got it for quite cheap so tried it. Made the car sound pretty awesome, but blew the welds at the flange after a while so went back to the stock.
I think it had something to do with this:
lol