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Discussion Starter #1
I currently have an LM7 that i installed in my 68. I have a few days off in the next few weeks and want to fill them with working on the car. the engine just doesnt feel like it has enough power so i am thinking custom Blackbear tune, headers, cam swap and fast intake. Now just gotta pick a cam here are a few i have been thinking of, please let me know what you think or if there is a better one for the project. currently its an auto trans, but will be going stick in next few months.... i hope lol.

COMP Cams 54-455-11
[FONT=Arial, Helvetica, sans-serif]COMP Cams 54-535-11[/FONT]
Lunati [FONT=Arial, Helvetica, sans-serif]60512[/FONT]
Lunati 60510

I am new to Cam swaps so please tell me if i am not thinking of something.

Thanks, David
 

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Discussion Starter #2
Here are the Cam specs i probably should have listed those earlier. Please help i would like to get a new cam for the 5.3l tonight so i can install this weekend.

215/223 .604/.610 112 Comp 54-455-11
210/218 0.513/0.507 115 COMP 54-535-11
232/238 .599/.601 Lunati 60512
212/218 .531/ .531 113 Lunati 60510
:D
 

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With stock heads I think you'd be best to limit it something in the 22x/22x duration range. The thumper looks interesting but I dont have any experience using them in LS motors. I would use an LS6 intake & save the money from using the FAST. On a stock headed 5.3 I don't think it would be worth it. Don't forget to get a good set of matching valve springs & hardened pushrods. I'd also get a new o-ring for the pickup tube & be sure to lube it before install. Keep us posted on the install!
 
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