If you've got a real Corvette intake and matching carbs- - - - -sell it to a collector/restorer and you'll make enough money to build a couple of high performance engines. The power gain over a proper sized single carb is minuscule, and the Corvette setup is priced like it's pure gold- - - -not plated! Take anything Clifford tells you with a big grain of salt- - - - -they're long on unsubstantiated claims, and short on facts and figures to back up their "fertilizer". A 268 duration cam needs more compression than an 848 head can make without going to very expensive custom pistons, and the RPM range where the power would be made is at the very top of what the cylinder head is able to flow.
If you want lots of power and RPM, trash the six and install a small block V8. You'll get twice the horsepower gain at less than half the price.
Jerry
