Good info from B-man. One addition--some valley pans with rear PCV--early to mid '60's had irregular edges to accommodate the bulges at the intake ports. I have several of these pans, but can't confirm which years or engines they were used on .Tripower or not, the bulges exist on the intake manifold at the ports.
One other comment. Back in the day, I put Tripower on my '69 Catalina Safari wagon that was a single two barrel 400 from the factory. The only thing needed was a '66 Tripower manifold/carbs and a gasket set. The original valley pan cleared the manifold. Maybe the '64, '65 and '66 intakes were high enough to clear the "pyramids." I also had no problem with the waterneck clearing the dimple on the timing cover.
It was amusing to see the response when station attendants checked the oil! Lots of comments.
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BONESTOCK GOATS
'64 GTO Tripower Hardtop (Wife's Car)
'64 GTO Tripower Post Coupe (My Car)
'99 Bonneville SE Sedan
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