67 Ford 390 ID numbres

Jim Hughes · 09-04-2015, 08:04 PM

Thank you for the help and replies.

mtkawboy · 09-05-2015, 12:15 PM

Curious, why no 390 truck block when Chevys can run Bowties ?

Bill Harris · 09-05-2015, 01:19 PM

If you are serious you will need to find an unmolested C6AE-H aluminum police interceptor manifold.

Also keep in mind that of all those Holley carbs listed you will want one that meets the specs for the C9AZ-U, C9AF-U, C5AF-BV carbs as it is the largest. NHRA doesn't care about having the exact OEM carb anymore, you just have to have one that has the proper throttle bore and venturi diameters. Those three carbs have the size spec'ed as 1686x1686/1375x1437 which translates to primary and secondary throttle bores of 1.686" (i.e. 1-11/16"), a primary venturi of 1.375" (1-3/8") and secondary venturi of 1.437" (1-7/16"). Those are the sizes used on all Holley 735/750/780 CFM carbs. Don't waste your time and money trying to find a 48 year old OEM carb Just get a Quickfuel SSR-780-VS and block off the secondary idle adjustment per http://www.nhra.com/userfiles/file/N...edProducts.pdf.
Life will be much easier.

FireSale · 09-05-2015, 07:12 PM

Quote:

Originally Posted by mtkawboy

Curious, why no 390 truck block when Chevys can run Bowties ?

A truck block may be OK. I'm pretty sure you can't run a truck engine even in GT.

Dale

Tom P · 09-05-2015, 07:31 PM

Find a thick walled block by sonic checking to take advantage of the overbore rule. Edelbrock heads are allowable too.

Rory McNeil · 09-05-2015, 08:48 PM

Quote:

Originally Posted by FireSale

A truck block may be OK. I'm pretty sure you can't run a truck engine even in GT.

Dale

Even if you could run a 390 Ford truck engine in S/S, I doubt that anybody would want to. Until 1975, all the pickup truck 390s were 2 barrels, and the last 2 years of 390 production,75 & 76, a 4 barrel version was available, but it was a low compession affair, with the pistons over .100" below the deck. In fact, Ford used a 410 piston in the low compression 390s, which were meant to be used with a 3.98" stroke (same as a 428) crankshaft, which explains the major deck clearance when used with a 3.78" stroke 390 crank.

09-04-2015, 08:04 PM	#1
Jim Hughes Junior Member Join Date: Oct 2004 Posts: 31 Likes: 0 Liked 0 Times in 0 Posts	Re: 67 Ford 390 ID numbres Thank you for the help and replies.

09-05-2015, 12:15 PM	#2
mtkawboy Member Join Date: May 2003 Location: Billings Mt Posts: 282 Likes: 186 Liked 54 Times in 18 Posts	Re: 67 Ford 390 ID numbres Curious, why no 390 truck block when Chevys can run Bowties ?

09-05-2015, 01:19 PM	#3
Bill Harris Member Join Date: Mar 2002 Location: Ooltewah, TN Posts: 421 Likes: 13 Liked 26 Times in 13 Posts	Re: 67 Ford 390 ID numbres If you are serious you will need to find an unmolested C6AE-H aluminum police interceptor manifold. Also keep in mind that of all those Holley carbs listed you will want one that meets the specs for the C9AZ-U, C9AF-U, C5AF-BV carbs as it is the largest. NHRA doesn't care about having the exact OEM carb anymore, you just have to have one that has the proper throttle bore and venturi diameters. Those three carbs have the size spec'ed as 1686x1686/1375x1437 which translates to primary and secondary throttle bores of 1.686" (i.e. 1-11/16"), a primary venturi of 1.375" (1-3/8") and secondary venturi of 1.437" (1-7/16"). Those are the sizes used on all Holley 735/750/780 CFM carbs. Don't waste your time and money trying to find a 48 year old OEM carb Just get a Quickfuel SSR-780-VS and block off the secondary idle adjustment per http://www.nhra.com/userfiles/file/N...edProducts.pdf. Life will be much easier. __________________ Bill Harris ex 2172 STK ex 2272 S/S

09-05-2015, 07:31 PM	#5
Tom P Senior Member Join Date: Mar 2002 Posts: 707 Likes: 30 Liked 239 Times in 94 Posts	Re: 67 Ford 390 ID numbres Find a thick walled block by sonic checking to take advantage of the overbore rule. Edelbrock heads are allowable too.