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#1 |
Member
Join Date: Nov 2005
Location: Jackson, NJ
Posts: 312
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I just picked up a 1967 Mustang that I want to build a D/SA. I have a few questions, and appreciate any advise.
1. Must be an Original Block?(Do NHRA/IHRA have approved aftermarket) 2. Must be Original Crank? (Do NHRA/IHRA have approved aftermarket) 3. What intake is allowed?(Do NHRA/IHRA have approved aftermarket) 4. I know NHRA/IHRA approved the Edelbrock heads, Can I use aftermarket rockers with Studs? I built an IHRA Crate motor car, I was going to build a 1993 Cobra, I decided on a 67 Mustang to match my superstocker... Thanks
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Richard Preiser 1613 FGT/I 1510 C/SA 161 F/DA |
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#2 |
Junior Member
Join Date: Feb 2008
Location: Sun Valley,Ca
Posts: 86
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No you don't have to use the original block or crank. You can use a Aluminum police interceptor Intake. You can also use roller rockers. Look under the NHRA comp.web page. It will give the updated and legal parts.CC's, replacement PARTS.ETC.
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#3 |
Senior Member
Join Date: Aug 2007
Location: California, Ky
Posts: 669
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What Chris said and in my opinion do yourself a favor and give Blair Patrick a call 423-837-1514.
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Kris Rachford 69 Cobra 428CJ 4 Speed C/S 3032 |
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#4 |
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Join Date: Feb 2014
Location: Lakewood Washington
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Go through this link to see what's already approved for that engine. You can ask to have a crank approved by submitting a form on this page. There are several standard weight forged cranks for the 390. Make sure the rod length is stock.
http://www.nhraracer.com/content/gen...545&zoneid=132 Dale
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Dale Shearon 68 Mustang 6394 |
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#5 |
Senior Member
Join Date: Jun 2007
Posts: 783
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4 speed was not available in a Factory built car until 1962. You could buy one over the parts counter in 1961 (T10 BW) along with 3 duce set up and it was NHRA Legal.
There are, NO after market cranks readily available for the 390-427 I am aware of at this time. You can modify a 391 crank (expensive $1500) or have a Specialty Crank Company build you one (more expensive $2500 min) All aftermarket cranks are for Stroker combo's and not Legal for 390-427 OEM stroke application for S/SS. A cast crank is not only lighter, it can handle most any S/SS application. I have been running 390's for over 20 years and have never had a problem with the strength of a cast 390 crank if done correctly. R J |
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#6 |
Live Reporter
Join Date: Oct 2004
Location: Hickory, Ky
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If you need a 427 crank just grove the mains of a 390 crank, and don't forget to grind the pin to 2.200 from the not so popular 2.437 stock size.
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