x303 or x306 frrp heads, whats the difference?

[footbrake]

I am looking at heads and I am curious as to what is the difference between
the M-6049-X303 and the M-6049-X306 ford racing heads.
they hae the same chamber and specs that I see, but one is $200 more then the other.

 

[84Ttop]

If your looking to buy brand new aluminum heads, Check out Trick Flow twisted wedge heads, much more bang for your buck in my opinion.

 

[SpartaPerformance]

I don't see the x303 head on the FRPP catalog, do you mean the x306 v the x307? One if 58cc chamber the other is 64cc

 

[srtthis]

isnt the x303 one of the FRPP cams? the heads are x306 and x307

 

[SpartaPerformance]

In this case its an old set of GT-40's the 6049 in the part number means its a cylinder head. 6250 is camshafts. I don't think those heads are available anymore so the price difference is sales places are having to dump them