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Thanks everyone for all of the information. I've got a much better understanding on this.

So, which is more important velocity or flow? Would the 318 head you ported in the stcky with the [email protected] 129cc ports actually perform better than a head with around [email protected] 179cc ports?

So, what characteristics of cylinder head design dictate port velocity?

Found some info on the stock magnum head flow. Here it is: http://www.moparmusclemagazine.com/howto/mopp_0507_cylinder_head_porting/viewall.html Hope this helps out someone else besides just me.

Thanks for all the replies. I should have gotten the 587's. I could still probably pick them up if that's what I decide to do. What about the magnums. How do the stock magnums compare to the LA heads. When considerring the same machine work (minor blending) to each type head.

I passed on a set of 587's from a 340 for $50 cause I read that they didn't have much potential. Was that a bad move?

Or any others without super rare heads like T/A. Which is the best factory head to start with for a good street strip setup? Also, without paying a machinist a small fortune in labor to get to flow well just mild machine work. What size valves to choose? I've read that running 2.02 valves...

So, does that mean my forged 340 crank that was turned 30/30 is worthless?

I say save the money from buying another core and stroke the 318. Then you can smoke 340's and 360's.

Okay, I've decided. I'm passing on the 360. I'm just gonna focus on using what I have for now. It's just hard passing a good deal. Thanks for the input.

I've currently got a 99' 5.2 Magnum for my Duster project but, found a good deal on a 92' roller 360 LA. Should I pick up the 360 and sell the 5.2 or just keep what I got. I plan on setting the car up for street/strip and eventually blow thru turbo. Thanks for any help.