This is from my own personal experience.

My 93 with 306 and a Vic Jr intake and 4150 Holley on it,.. I COULD close the stock hood with out hitting the carb but I had to take the stud for the air cleaner out.

I replaced the stock hood with a 2.5" Cobra-R style hood. And with a small 2.5" tall air cleaner the hood would still hit the air cleaner. A 3" hood would have cleared it,.. but just barely.

This is the hood in question.


I had to run with out an air cleaner at the track.

IMO with a 351 and taller intake like a Vic jr your going to need at least a 4" hood. With a Performer RPM I think you could get away with just a 3" hood. But definitely aim for something larger than a 2.5" hood just to keep a safety margin.

Hurst

 

yea harold you need to get the hood that hurst has on his GT that looks good not to tall and not to short....if you buy my GT you will already have a cobra R hood,bumper and rear bumper

 

I think you'll end up having to loose the 2" spacer with a 3" hood

 

Thats only a 2.5" hood on my car. Not sure if it will clear with the 351 under the hood. 351 deck sits 2" taller in the engine bay than a 302 deck. I've measured a 351 in an 83 before. That was with stock motor mounts. So maybe it will fit with drop mounts,.. depending how much of a drop. A performer intake by itself isnt that tall. Not when compared to something like a Vic Jr or even a Torquer or Air Gap.

I'll be running an Air Gap in mine but I will be going with a 4" hood just to play it safe. I want to run a taller air cleaner. I think you could get away with a 3" hood easily with that intake. Take some measurements and see what you need.

Hurst

 

Drop mounts are 1"