GM 781 Cylinder Head Flow Bench Testing 620HP Street 781 Big Block Heads
How to get a Mark IV with 781 heads up to 9:1 compression? From high rise to low rise, square bore and spread bore, this one is all about which intake will give you the most bang for your STOCK 088 BBC REC-PORT IORN HEADS VS SUMMIT IRON HEADS! LET'S TALK ABOUT THE DYNO RESULTS WHEN I BBC BUILDS-SHOULD YOU GO BIGGER? 468 VERSUS 496 BUILDS-WHO DID IT BEST? CHECK OUT THIS VIDEO Big Block Oval Port Head Porting Part 2 ...