In my '65 ChevyII I ran an offy 3-carb intake on a stock 230 with three glass-bowl Holleys. It didn't do well until I installed a set of dual headers with dual exhausts and Smitty mufflers. up-graded ignition helped some, too. It sounded great and pulled hard all the way to about 5,000 rpm....where the valves began to float.
Later, with some pocket porting, an Iskendarian cam, lifters and new springs, that sucker really woke up. Everything else was left stock and it was a good and peppy cruiser.
