49 geezer- make sure to seal the two plug in the offy before mounting it- They will leak sooner or later- If you use exhaust gas to heat the manifold you might not notice but will probably be inhaling carbon monoxide while driving.
Welding them up is the only way- either pull the original steel plugs and replace with aluminum or have a piece of aluminum bigger than the hole welded over it.
'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi
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