Head selection

Adger Smith · 11-05-2015, 10:06 PM

There are two versions of the 462624 head that I know of. There was a version from 1971 thru 1977 and another from '78 to '86. I'm assuming the late one is the version that is redesigned to save weight. Is it the earlier one that is more desirable?
There is also a 458624 listed that was in an early and late version, but I've never seen one & it is not on the NHRA list. Must have been in trucks only.
703 head is listed as:
1978-1980 HP 350/220/225/230 1.94 1.50 78cc chamber

Mike Taylor 3601 · 11-06-2015, 10:49 AM

I can't remember any 624's besides the lightweight version,can't remember ever seeing 703,556 heads.
Mike Taylor 3601

Bench Racer · 11-06-2015, 06:07 PM

Adger, my brother David ran a 624 head super stock combination several years ago. I think it was a 1981 Chevy 350/175hp engine with a Q-jet. It was a very stout piece in SS but had some "high dollar" heads on it. Not sure how they would flow in stocker trim. The numbers were 462624.

Chipper Chapman · 11-07-2015, 06:08 PM

624 was the lightweight version of the 882. Very prone to cracks and many cores only had a 1.72 intake.

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

11-05-2015, 10:06 PM	#1
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Head selection There are two versions of the 462624 head that I know of. There was a version from 1971 thru 1977 and another from '78 to '86. I'm assuming the late one is the version that is redesigned to save weight. Is it the earlier one that is more desirable? There is also a 458624 listed that was in an early and late version, but I've never seen one & it is not on the NHRA list. Must have been in trucks only. 703 head is listed as: 1978-1980 HP 350/220/225/230 1.94 1.50 78cc chamber __________________ Adger Smith (Former SS) Last edited by Adger Smith; 11-05-2015 at 10:11 PM. Reason: add 703

11-06-2015, 10:49 AM	#2
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 358 Liked 308 Times in 103 Posts	Re: Head selection I can't remember any 624's besides the lightweight version,can't remember ever seeing 703,556 heads. Mike Taylor 3601

11-06-2015, 06:07 PM	#3
Bench Racer Member Join Date: May 2002 Location: Green Creek (Tryon) North Carolina Posts: 331 Likes: 69 Liked 99 Times in 21 Posts	Re: Head selection Adger, my brother David ran a 624 head super stock combination several years ago. I think it was a 1981 Chevy 350/175hp engine with a Q-jet. It was a very stout piece in SS but had some "high dollar" heads on it. Not sure how they would flow in stocker trim. The numbers were 462624.

11-07-2015, 06:08 PM	#4
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 473 Likes: 246 Liked 166 Times in 71 Posts	Re: Head selection 624 was the lightweight version of the 882. Very prone to cracks and many cores only had a 1.72 intake. __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090

11-07-2015, 06:37 PM	#5
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 531 Liked 333 Times in 180 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