Re: 4.3 Chevy v6 builds.
Most people associate 3.8s as 60 degree engines. There was a 3.8 90 degree engine but that would be an even more outlandish idea than a 4.3.
There's no reason to reinvent the wheel. The reason people don't use 4.3s is because it doesn't make sense. It will cost multiple times to make the same power as a junkyard LS and won't have the reliability.
Don't let us stop you, it's your stuff, but if you think 1,000 horsepower out of a 4.3 is possible for under $10,000 you're fooling yourself. Let alone making it stay together for more than a pull or two on a dyno.
69 Malibu Stock 307, Reverse Manual TH350, 4,500 Stall Edge Converter, 4.56 Spool 35 Spline 12 Bolt
76 C20 VortecPro 496 628HP 655 lb/ft TH400 Edge Converter, 4.10 14 bolt