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V · 03-14-2009, 01:08 PM

ok, i have an 85 iroc ill be rebuilding next spring. it has the original lg4 and i want to keep the 305, this will be a cruising car, NOT a race car. However i want to upgrade the motor to L69 specs. I know the ecm chip is different, but what else is different? cam possibly? I'm gonna be rebuilding the whole motor myself along with swapping 80% of the original car into a new chasi(one that isnt rotted out)

03-14-2009, 01:08 PM	#1
V Stalker Join Date: Aug 2004 Posts: 12,082 iTrader: (12)	LG4 vs. L69 specs....? ok, i have an 85 iroc ill be rebuilding next spring. it has the original lg4 and i want to keep the 305, this will be a cruising car, NOT a race car. However i want to upgrade the motor to L69 specs. I know the ecm chip is different, but what else is different? cam possibly? I'm gonna be rebuilding the whole motor myself along with swapping 80% of the original car into a new chasi(one that isnt rotted out)