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FED 387 · 11-07-2015, 06:37 PM

Sm valve 624 came on L48--- large valve on L82--- 75 and later heads have an EXTRA exhaust manifold bolt hole ---VERY prone to cracking ---check around coolant holes and between valve seats--FED 387

11-07-2015, 06:37 PM	#8
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,429 Likes: 567 Liked 336 Times in 183 Posts	Re: Head selection Sm valve 624 came on L48--- large valve on L82--- 75 and later heads have an EXTRA exhaust manifold bolt hole ---VERY prone to cracking ---check around coolant holes and between valve seats--FED 387