400 B, ported iron heads, 6 pack, hp manifolds, comp 274HR or 280HR ?

[557hemi]

400 .040 over, ported steel heads, 6 pack, hp b body manifolds. I already have these cams 274HR and 280HR , which would be best ???
Weekend cruiser. Not taking to track. Going in a dart, 3000 stall with 4.10s
Thanks

 

[PRHeads]

Sort of a coin toss.

If the converter is an 11”, I’d go with the 274.
If it’s a 10”, then the door would be open for the 280, if you were okay with some slightly diminished low speed manners.

 

[557hemi]

Thanks Dwayne. I’ll probably use the 274 then. It has flat tops and the chambers measure 79.5cc.
I came up with 9.25 to 1.
Might swap out the 4.10s eventually for better cruising. Pic of short block I picked up yesterday.

 

[496 polara]

If you aren't racing it then the 274 will be happier putting around.

Dwayne did cover that already.

 

[6PKRTSE]

I would also agree with the others as mentioned.