Blue Anodized Aluminum Carburetor Adapter, -08 Male JIC 37 deg Flare To Holley Dual Feed 750 through Dominator 1350 Series and Quadrajet up to 1974 with 7/8-20 thread. Includes crushwasher FBM3516., Long Straight

For a Holley Dual Feed 750, yeah, this is the right piece. It threads into the carb using a 7/8-20 thread and steps up to a -08 Male JIC 37-degree flare on the hose end, so you can run braided AN line straight to it. It's the long straight version, blue anodized aluminum, and it comes with the crush washer already included so you're not hunting one down separate.

For a Holley Dual Feed 750 through Dominator 1350 series that uses a 7/8-20 inlet thread, this adapter is made for that job. It has a -08 male JIC 37 degree flare on the line side and the 7/8-20 carb thread on the other, and it comes with crushwasher FBM3516.

This adapter is designed for Holley Dual Feed 750 carburetors, as well as Dominator 1350 Series and Quadrajet carburetors up to 1974, provided they use a 7/8-20 thread. It should work just fine for your 750.