holley gasket dont match up with elbrock intake

hi there when removin the holley street adv carb on the elbrock perfomer rpm high rise intake I notice the gasket matched the carb just fine but it was ovewr lapping the intake bad I take it this is now how it should be?Is there some soret of special gasket that I can use to match the carb to the intake?or should i go and mod this one?

thanks  

This is typical of square pattern carbs on intakes with a spreadbore carb pad. The fix is easy, most speed shops and many parts stores can sell you a thin (1/16-3/32") plare with an extra gasket. You install one gasket on the manifold, then the plate, another gasket and then the carb. The carb and gasket seal to the top of the plate and then the plate and bottom gasket have enough overlap to seal on the manifold without vacuum leaks. Hope this helps.
Steve  
A little help... 'cause we don't all have to learn the hard way!

hey man thanks for clearin that up found what I needed on ebay and im good to go!
i take it i would be losing a bit of HP with that gasket on there  

Ususally not Hp, just idle and driveability due to the vacuum leak. Check your jetting afterward, you may have to lean it out if it was jetted to compensate for the vacuum leak (assuming it did have a vacuum leak).
Steve  
A little help... 'cause we don't all have to learn the hard way!

You can also use a FelPro carb gasket 60123. It's thick and wide.  

just go this adapter plate and it has the same gasket for each side of the plate does that seem right?
thnaks  

Is the plate slightly larger than the carb base? The ones I've used were a bit larger and allowed some extra overlap.
Steve  
A little help... 'cause we don't all have to learn the hard way!