289 Rebuild with 2bl to 4bl

74stang2togo said:

That's a Chinese knock-off that looks like a cross between an Edelbrock 2121 and a 7121.

For the whopping $25 more, I'd rather buy the used genuine Edelbrock manifold listed on Ebay and know what I'm getting.

EDELBROCK 2121 PERFORMER 289 MANIFOLD--260-289-302-Small Block Ford | eBay

EDELBROCK 2121 PERFORMER 289 MANIFOLD--260-289-302-Small Block Ford . Condition is Used. Shipped with Standard Shipping.

rover.ebay.com

That Chinese manifold could work just fine, but if its flow characteristics are more like the 7121 (which is the Performer RPM) than the 2121 (which is the Performer 289), you're probably going to kill your low end torque and driveability on a stock 289.

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