Has any one used the holley adapter plate that converts your throttle Body to a spread bore or square bore? How much are they and are they worth it.

 

It was about $40 and made the swap very simple and much more speedy.

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305 TBI
700-R4
L98 cam, 1 5/8 headers, 2 1/2 y-pipe, 4bbl edelbrock performer, holley adapter, open element K&N, afpr, flowmaster catback, MSD coil, accel wires cap & rotor, vette servos, shift kit, 2000 stall converter, TC lockup switch, all the free mods and some I left out.

 

They are worth it is you don't have the time and the resources to build one. They're cheaper than the TB spacers so I think it's a good deal. You also have more intake manifold choices with the adaptors. I'm running an RPM intake on vortec heads with the holley adaptor and it looks great. Too bad the car isn't starting :-(.

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, Jon (in process of installing new engine)