Well, I don't know, I cut and try, I do find that there is no profit in following the crowd, I will try anything I can think of, I do think the longer valve guide is best for the street, for race engines who knows,
The heads on my dragster were ported by John with no input from me, I did the valve job and the shorted the guides (for seals). 

Lord Gaga.  Earlier in this link about the heads he purchased, Cliff indicated that one large letter 'G' cylinder head was posted and one was not.

Regarding these heads that Cliff purchased, I was surprised that where the intake valve guide protruded into the intake port bowl on these heads, the protruding guide material was totally removed as opposed to the cylindrical valve guide body being shaped to direct the air flow in the bowl area under the intake valve head.

NOTE:  I'm not a flow-bench supported cylinder head porter.  I have observed other individual's porting work where the intake valve protruding guide material has been retained, BUT shaped in a wedge, tear-like shape to direct air flow under the intake valve head.

Cliff.  My recollection is that you indicated you had worked with John Mummert in modifying the cylinder heads you have installed on your dragster motor.  QUESTION:  Is it your understanding that the shaping of the intake and exhaust porting immediately below where it enter the valve seats and also above where the valve seats enter the combustion chamber is critical to optimum port air flow numbers.

Thanks for all that you have shared in assembling your motor for the dragster and installing the motor in the dragster body.  Much appreciated!       .    


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

What's with the shape of those combustion chambers? And are they posted?

"FREE SAMPLE"

On the flow bench yesterday 235 CFM @ 5.50, 28" of water, high port, bare (no rolled clay), not adjusted for air temp (raw numbers), only had a short time to flow these. work on the dragster took all my time.

Well, going on the flow bench, we'll see if their any good, looks to me like the intake bowl is cut wrong, maybe I can correct it with a larger valve (has stock valves now), the SSR on both intake and exhaust looks nice (to me), they may end up on one of my backup race engines.

Lots of work on them for sure..  I'm not an expert on porting them, but looks like they were intended for Race use..? 


Paul

Picked them up today, 1 non posted, 1 posted










 

Try this
https://www.ebay.com/itm/Ford-Y-block-heads/264531260862?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649


or

 Show additional actions

Estimated delivery Local pickup

Ford Y block heads

Item price	$325.00
Quantity	1
Item number	264531260862
Shipping service	Local Pickup

Contact sellerReturn item

Cliff.  I'd like to look at the enlarged views of the pictures of the cylinder heads you obtained.

Consider sharing the eBay item number of your purchase.  It's located on the right side of the eBay item listing page, usually above or below the 'Item Specifics' advertisement information.

Thanks!


NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Well E Bay makes it hard, I bought these for $325.00 plus TAX (!!!) and I have to drive 120 miles round trip