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#4
Re: A12gx v A15 head
ddgonzal
Posted on: 2010/1/25 19:31
For a mild streeter as you specified, the A15 head will be better than A12GX. Use the GX head for a high-RPM engine. The GX ports are considerably bigger.
Yes, the GX head bolts on the A15 but won't work correctly. It will burn up the rockers unless you modify the head for oiling passage.  
#3
Re: A12gx v A15 head
elemental_funk
Posted on: 2010/1/25 14:25
you would have to be very keen to get a gx head for a streeter considering they cost so much and are difficult to find. an a15 head has slightly smaller ports than a gx, but larger valves. personally i would go with the a15 head.
#2
Re: A12gx v A15 head
Dundee1000
Posted on: 2010/1/25 11:19
yes no mabee,
yes it will bolt on, performance depends on mods to either head or engine..
#1
A12gx v A15 head
Gypsy
Posted on: 2010/1/25 9:35
Q1 what would give best performance for a mild streeter
Q2 will A12 GX head bolt straight on to A1500 block
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