Looking for pics of underside of offy for 70+ head

[tucknroll]

I'm looking for any pics (or links to pics) of the underside of the offy manifold for the later model heads ('70 or later...flat topped log). I'm curious to see how they seal.
Thx!

 

[powerband]

Offy 'Adpt. is just flat milled on bottom with o-ring lands on outer ports.
this might help:

,71 Maverick C9xx head mockup:

Center uses no o ring:

NOTE Different port sizes and "height" from log for clearance. Also Critical milling height diference from center gasketed port.

(I still worry about the O-Rings every time the 250 beast backfires on
startup !)

 

[tucknroll]

Perfect! Thanks! I was wondering how they were able to seal the outer carbs but it looks like they are smaller than the center. What size hole was drilled in the log for the outer carbs?