Pros: Done right, "trips" could give a hot rodder "four barrel" performance with even better fuel mileage. What's more, they are rarer then other carb setups... so there's always the "cool factor".
Cons: Cost. More parts translates to higher costs on average. Also, the time it takes to build and "dial in" a typical set up. IMO, multi-carb setups separate the men from the boys when it comes to tuning engines.
Strange Fact: Chevrolet never released a Tri-Power manifold for the Small Block as a production item. However, Chevrolet did produce Tri-Power systems for the big blocks; the 348 "W" engine got a system with Rochester carbs, while the 427 Mark IV engine from '67 thru '69 could be ordered with triple Holleys.
Here is a short list of aftermarket Tri-Power manifolds:
Edelbrock 5419 (unpolished) and 54191 (polished)
Designed for 283-302-305-307-327-350-400 c.i.d. Chevy V8s. This manifold has a balanced 180 degree firing order port runner arrangement. It contains an exhaust gas heat riser and offers excellent performance potential. Carb center-to-center: 5-1/2".
Demon/Barry Grant "Six Shooter"
The Triple D Six Shooter from Demon is the ultimate intake package. It features an all new intake design, three newly designed 250 cfm carbs, electronic choke on center carb, custom fuel log and progressive linkage, a 3" tall air cleaner and custom water neck. TriPower like you have never seen it before!
Listed in the Offy catalog as a single-plane manifold for '55--'56 265. Available machined for 3-bolt flanges for Ford/Stromberg carbs; or with 4-bolt flanges for small Rochester carbs.
Listed in the Offy catalog as a single-plane manifold for 283, 327, 350, 400. Also available machined for 3-bolt flanges for Ford or Stromberg carbs, or 4-bolt flanges for small Rochester carbs.