DisturbedTA

iTrader: (3)

ok ipulled the heads from the motor for my ta and the casting is 10128374 i was wondering if these are good porting heads and what year they r off of the car was a 94 ,never kno tho right thanks

za355tx

iTrader: (108)

Yes 374's are good for porting. The 643's are good too. The ones least suitable for porting are the 561's.

James Montigny

iTrader: (13)

robsquikz28

iTrader: (246)

yessur

DisturbedTA

iTrader: (3)

sweet!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

monster81

i recently gasket matched a set of aluminum heads off a '97 camaro casting # 12551561,,didnt want to port the whole thing cuz im already goin to get AFRs in the next few months,,,,,,,anyway,what makes these bad heads for porting,,i never noticed that, whats the diffrence, any flow rate diffrence between the diffrent casting numbers

GIZMO

iTrader: (8)

Yes. As cast the 561's flow quite a bit less than the other castings.