new here... 79 silverado

[2502]

Ok, That's what I thought, you have a speadbore intake (small primaries, large secondaries, not 4 similar in size) but your carb has 4 similar sized throttle blades. Yes, you need the plate, however maybe not the one you got. The Edelbrock pt # EDL-2732, looks to be the one that would work. It really just closes off the gap at "hips" sticking out beside the standard carb. If the spacer you have is in the way of the carb linkage, ect. maybe you can clearance the side a little just where the problem is, but not effecting the sealing area. You will need to use a spreadbore gasket on the bottom & a standard one on the top of the spacer. Can you take photo's? Hope this all makes sense to you. Lorne 

ok here's what i just shot in between the bottle and diaper change...

the plate that i got is just short. but i didn't take a pic. its' from pep boys, with the edelbrock stuff, cost me like 25 bucks no big deal. i have to use my phone to shoot these so i hope it's clear enuff. these are without the spacer obviously but you get the point as to waht i was talking about it not hitting. i also shot the bottom of my carb and a pic of my intake.. click the pics to blow them up

[gezn2]

I'm no expert, but I think that type of edelbrock intake uses a spacer plate between the carb and the top flange of the intake, different ones for different carb setups.
If I'm right that'll take care of your clearance issues and give you a good surface for the carb gasket to seal on..........

[2502]

i got the spacer for it, it's still just a little bit off. someone said stack another one, another person said to just get another set of the gaskets ike they included and that should clear it.