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Thread: %.0 litre GM heads.
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07-09-2013, 05:55 PM #1
5.0 litre GM heads.
Anyone know if there's any difference between the 12558059 and 12558060 heads? Having trouble finding a set of heads for a late model 5 litre MPI, the 059's were on it, and Summit has a new set of the 060's......
Last edited by flabum1017; 07-09-2013 at 06:09 PM.
"One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .
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07-09-2013, 06:17 PM #2
Chamber size?? think the 5.7's had a bit more compression, early 5.0L had smaller valves but the never ones were the same. From what I remember.
Dave1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
1988 BAJA Sunsport 186, 96 225 Pro Max
79 12' Auminum, 95 Merc 9.9
RIP Stu
"So many idiots, so few bullets"
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07-09-2013, 09:06 PM #3
After some research, the 059 heads have 1.84 valves and the 060 heads have 1.94 valves...... can't use them............
"One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors". Plato .
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07-10-2013, 10:48 PM #4
I got a complete 5.0 mpi shortblock with 164 hrs looking for a home. Was in houseboat and never ran over 3500rpm. Owner was on a trip and engine shut down due to oil pressure loss.