QUALITY REPRODUCTION, WE HAVE BEEN USING THESE FOR A FEW YEARS NOW, THEY WORK MORE EFFICIENTLY AND LEAK LESS THAN AN ORIGINAL NEW OLD STOCK ONE, DUE TO BETTER MATERIALS AND CASTING TECHNIQUES. BEWARE OF CHEAPER REPRO ONES THAT ARE NOT THE CORRECT LAYOUT. THIS ONE IS READY TO BOLT ON INCLUDING THROTTLE ARM, VAC ADVANCE AND CHOKE.