splitting a Buick 8 manifold?

Anybody ever do this?the 4th and 5th ports share the same chamber so the only logical way to split them would be 5 and 3?Im stumped,any insight would greatly appreciated.thanks-Jaime

 

Is it the 248/263 or the larger 320? The exhaust manifold on the 320s had a removable heat riser/outlet section that allowed access to the 4/5 ports; you may be able to weld a splitter plate in the center to divide it 4 and 4. I know that a lot of guys used to settle for the 5 and 3 split.

 

it is the small 8,do you know if the 40-41 dual ex manifold will work with the '36 single intake manifold?

 

Do you know if the '41 dual ex manifold will work with the '36 single intake manifold?
Yes, they'll work. A blockoff plate over the heat riser box is needed ...

 

ok,thanks!Now I need to find one.