"Please bear in mind that I le
"Please bear in mind that I left the business some years ago, 2004 to be more exact. (went sailing around the world instead).
At that time the only one that had the divider wall was the original one, which partly made it a bit more expensive due to casting problems. Have a look in Your old one and check to be sure. At the time when I was 'active', when that wall started to burn/corrode down it was time to change to avoid the corrosion on the cyl#4 exhaust port. I do not feel like naming 'names' things might have changed. If any of my customer wanted to install other brand, they had to bring it them self to my workshop, and invoice/receipt was noted: Parts and warranty by customer! If You still have the original manifold from 82, I do not think You may get an aftermarket that will last that long!"