You used the original cam and lifters? How many miles on cam? I would have put a new cam and lifters.
What is the rear end ratio?
What carter carb did you use? Themoquad 650 ?? Is it bogging when you slap on it or do you feel your running out of gas go up in the gears with the accelerator floored?
Engine Test Stand Playlist: https://www.youtube.com/playlist?list=PLwoxyUwptUcdqEb-o2ArqyiUaHW0G_C88 restoring my 1968 Firebird 400 HO convertible (Firedawg) 1965 Pontiac Catalina Safari Wagon 389 TriPower (Catwagon) 1999 JD AWS LX Lawn tractor 17hp (my daily driver) 2006 Sequoia 2017 Murano (wife's car) 202? Electric car 203? 68 Firebird /w electric engine 2007 Bayliner 175 runabout /w 3.0L Mercuiser__________________________________________________________