Carb spacer review for the carb guys out there?

How many of you fellow carb guys are running spacers? I've always wanted to try out one of those badass Wilson Manifolds spacers, but the prices always scared me off. Well turns out a local Factory Stock racer switched to EFI and sold me his spacer for $50 (which is brand new and was $140 new)

Baldwin Performance Carburetor - Guys we've been swamped with the

New Wave Carb Spacers

Fine Tuning: SBF Carb Spacers

Spectre Performance 5764 Universal 4-Hole/Open

Carburetor Spacer - 4150 / 1.00 4-Hole Tapered – Wilson Manifolds

JEGS Carburetor Spacer

HVH 1 Dual Plane Intake Manifold Carb Spacer for 602s, ST4150-2AL

Carburetor Spacer for 70s Ford : r/MechanicAdvice

Offenhauser 5880 Offenhauser Carburetor Spacer Adapters

Free Shipping - HVH Super Sucker Carburetor Spacers with qualifying orders of $109. Shop Carburetor Spacers at Summit Racing.

High Velocity Heads SS4150-1AL HVH Super Sucker Carburetor Spacers | Summit Racing

Allstar Performance ALL25986 4150 1 Tapered 4-Hole Hi

2″ Lightweight Carburetor Spacer

Best carb spacer for a 602