Time to add some inexpensive HP

Trevor B said

Just in case... how does one match a cam to the carb/intake?
I'm planning on the Performer intake with the 600 Edelbrock. Would I buy a set that includes the lifters and valve springs or are they easy to pair up?
One thing to consider is that I've already got somewhat low vacuum... don't upgraded cams often reduce vacuum?

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Your initial plan is still good. The performer will work, as well as the Edelbrock. Once into the cam, now you need to change valve springs to get the most out of it. Now you are changing springs either with the motor together or you pull the heads. If you pull the heads, do you mill them and do a valve job while they are apart? You see where I'm going? The next thing you are rebuilding the engine. I'd tell you to replace the timing chain as that is the weak link in any engine. You should be happy with the improvement just changing the carb and intake. Not that the guys are wrong, they are right, it's just how big a project are you up for now.