FULL FLOW BENCH RESULTS! 4.3L L99 VS 5.7L LT1 & LT4 HEADS. WHO FLOWS MORE? WHAT ABOUT VALVE SIZES OR CHAMBER DIMENSIONS?
MOST IMPORTANTLY, CAN THE BIG-VALVE LT1 OR LT4 HEADS BE RUN ON THE SMALL-BORE L99 BLOCK? CHECK OUT ALL THE FLOW NUMBERS (WITH FLOW PERCENTAGES), VALVE SIZES AND CHAMBER MEASUREMENTS TO SEE IF WE CAN (OR NEED TO) UPGRADE THE IRON L99 HEADS WITH ALUMINUM LT1 OR LT4 HEADS.