Been checking in with my Buddy's in Brazil. They have a newer design turbo manifold for our 6's.
It has a better design to balance the exhaust going to the wastegate.
Lighter design
Better machined to fit T4 turbos

Here is one compared to the other design.
Also one just sitting on our 1941 Hudson for trial fit purposes with 250. I also held a T4 turbo on it and it cleared. Even the motor mount.

I have them in stock if anyone is interested.

Price?

Should be around 425 delivered to the lower 48. Fitment would still be tight on most 64-70+ Chevy's with a 250 because of the steering column. If a 292 then clearance would be better.

Will the bolt pattern or shape of the flanges allow you to flip the manifold upside-down for use with a custom built intake manifold?

Even though the port spacing is symmetrical, the bolt pattern for the intake and exhaust ports is not. So I would say no.

Thank you.

Where exactly is the waste gate it's not flash glad in like the older model

The wastegate hookup is on the bottom, dead centered in the middle. And there is room to hook up a discharge pipe then to the wastegate.

Looks pretty nice and the price is much better as well. I'd like to see if it fits into something the size of a Camaro...

I'm with you gbauer. If this magically fit a first gen camaro I'd have a hard time not trading in my 292 manifold.

I am trying to work on looking at placing a turbo on 235's that I have in both a 57 and 58 Chevy. I'm trying to read all that I can and learn what this would take and if it would be possible. Looking through here I found your post and was curious if this manifold would work on those engines?

The port spacing is too dissimilar between these two engines for it to work. I make header flanges for both of them and its not close enough to make them interchange, plus the bolt patterns are very different also. A custom turbo header is going to be your best option.

Is there typically enough room below for the wastegate? Look a bit tight on the pictures, and the engine mounts are also around there at the bottom.
And an adapter is needed, correct? Wastegate flange looks a bit untypical.