How hard is this to do? And how do you do it?

 

Normal Holley or DP?
But still very simple, i can evan show you pics if you want.

 

Double Pumper. 650cfm.

 

well there are 2 jets and one power valve in eatch metering block, Id say you would have 2 of them.
well all you need is 1 flathead screw driver, 2 bowl gaskets, 2 metering block gaskets, 2 powervalve gasket (looks like a big metal washer) and i don't know if the primary jets have gaskets. now what you do is remove the bowls and the main jets are on the outside face of the metering block then peal the metering block off the carb (this can be very hard if it hasent been done in ages, Mine felt like it was welded on) and the power valve is on the other side all up it took me about 25min.
when i get home ill upload some pictures, if i can find em.

 

Pics would help alot, thanks!

 

Most universal DP's only have a power valve in the primary metering block.

Here's an expanded view of the carb. Not all parts apply specifically to your carb. http://www.holley.com/data/TechServi...ded%20View.pdf

 

Sry I couldent find the pictures last night, I think there on my GF's laptop and she had it at work with her.