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FED 387 · 11-23-2009, 03:31 PM

3986339---1.72 intake/1.5 exhaust-74CC--- 68-69 307 eng

3986339X--SAME SPECS(int/ex/cc)---71 307/350 eng

3998991---1.72 intake/1.5 exhaust--75CC ---68-69 307 eng
72-73 307/350 eng

hope this helps--Comp387

11-23-2009, 03:31 PM	#2
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,419 Likes: 528 Liked 332 Times in 180 Posts	Re: question on matching head numbers 3986339---1.72 intake/1.5 exhaust-74CC--- 68-69 307 eng 3986339X--SAME SPECS(int/ex/cc)---71 307/350 eng 3998991---1.72 intake/1.5 exhaust--75CC ---68-69 307 eng 72-73 307/350 eng hope this helps--Comp387