will a bigger cam kill the torque?

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In this case, the Comp Cam is smaller by a few degrees and will make more torque with the shorter intake duration as well as the added help of the cam being a split duration with more exhaust, I'd say torque would go up very well.
 
It's all relative. Liek they said.. You have a mild cam now, so going to another mild cam is a lateral step, not forwards or backwards in terms of performance. Very generally, the larger a given cam lobe, the more the two (intake and exh) lobes will have to overlap in order to open and close at the right times. The overlap of the lobes is what can negatively affect low end response and torque. But in smaller cams, there's very little or no overlap anyway.
 
First thing you need to do is NAIL DOWN that compression. Sayin "it's between this and this" ain't gettin it. Thirty years ago, that might have been good enough, but with today's modern cam grinds, you need to know your exact dead nuts on static compression ratio or you will never acheive the peak power for a given combo. If you really want a good camshaft recommendation, then you need to be blueprinting that compression ratio. If you're really serious about it, that would be up to and including removing the heads to get it done. It's really no that bad a job on that motor at all anyway. You might can get "in the ballpark" without removing them, but that is really the only way to get it right on the money.
 
Since you are running a 440 and IF you are at 10:1, you can get by with a bit bigger cam. Running the small cam IMO is leaving some power on the table.
 
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