The 139671 is the 525EFI cam. It will have slightly better manners around the dock.

I don't think you'll see any big differences between any of the ones you posted. I'd prob go with the 525EFI cam.

Care to elaborate?? is there a bigger/better option I didn't post?? those were just the 2 I saw close to the 741 that was recommended??

Thanks!!

741 cam (525efi) is plenty of cam for 454. That cam is not hard on the valvetrain, and if you have ever heard a 525efi (without mufflers) they definitely get your attention.

My cam is similar to 525efi cam. Its a crower 236/245 , .629/.632, 114lsa . 468ci. Ive ran it with 177 blowers, 250, and 420 blowers. Sounds good , and idles well. With dart 308s and cam installed at 110icl, peak hp was at 6000-6200. With eq heads that flowed better, and 114icl installation (4* retarded), it pulled to 6500rpm. Blowers will typically raise the operating range of a cam, esp a decent sized one.

i defintely would not go smaller if you want to make some steam down the road.

Yea I def plan on upping boost and power down the road...when the 6-71 goes on I'll cross that bridge and yea I don't want to have to do a cam swap when I make that transition

Also spoke with the engine builder this morning and they agree those cams will work well...he is doing some research and I have to call him tomorrow morning with some other options from different manufacturers just so I know all the options

Supercharger/Nitrous Retro-Fit Hydraulic Roller Cam - Chevrolet Big Block 299/304 - Lunati Power

opinions on this one?? its like half the cost of crane....

https://www.crower.com/camshafts/chevy-396-454-hydraulic-roller-cam-253hr260-late-model.html

crower option...maybe a little big for my needs

http://www.compperformancegroupstores.com/store/merchant.mvc?Screen=PROD&Store_Code=CC&Product_Cod e=11-456-8&Category_Code=MARKIVCAMHRXM

comps offering...looks solid??