Hey elmo, I would try sacramentomustang,com or Larry's Mustang in Fullerton, CA. They can help you. Larry's is good tech support (a little better than Sac mustang). I have a 65 that is a HiPo clone. Drive shafts are tough because they were slightly different than the standard 289. All
289 cranks are cast iron and externally balanced from the front and rear. None were made of forged steel. The standard crank has a 4.00 x 2.87 inch bore and stroke. The differnece lies in the density of the iron it was cast from. Ford checked iron density using a Brinnell Hardness Test. This test can be spotted on a HiPo crank in a small polished area on one of the cast throws. Cranks were randomly tested and if passed, installed in a "K" engine. These were just simply the strongest of the cranks and nothing specially made. Be aware that this marking can be duplicated on a standard crank to bring a higher price. All 289 cranks are pretty strong anyway. All the 289 cranks have a "1M" identification stamp (this is not the hardness test). The standard 289 crank order number was C3AZ-6303-F and the "K" code crank was order number C30Z-6303-B. HiPo cranks also had an additional "hatchet" counterweight on the crank, behind the timing chain (part #C30Z-6A360-A). Outside the timing chain cover was another counterweight which was the harmonic balancer. On the "K" engine the balancer was increased to 1and 13/16 ths inch thick. The standard balancer was only 1 inch thick. These balancers were part #C50Z-6316-A (-C) and will have C30E-B or C50E-A casting numbers. Service replacement balancers are still available under the same part number, but have casting number C8ZE-6316-A. Standard and "K" crankshaft pulleys are the same on 1965 and later engines; however, on 64.5 and earlier HiPo's, there was a reinforcing plate mounted inside the pulley. The crankshaft pulley washer is a little different and used part number C30Z-6378-A. Be aware that the flywheel is different on the HiPo. There are many other differences as well. If you want everything the book to buy is "The 289 High PerformanceMustang" by Tony Gregory (Performance Publications, 115 Bellridge Dr., Lafayette, LA 70506). I think Sacramento Mustang has this book. It is a wealth of information (you'll be amazed). The main reason for the extra stuff on the HiPo was so that it could reach 8000 RPM instead of 6000 RPM like the standard 289's. (Heads are different too) Mine was originally an "A" code at about 225 horses (is around 310 now). If you took a standard 289 crank and put the HiPo balancers on it this should work. You might also try J & K's mustang in Sacramento CA (916-332-1872) Sacramento and Larry's are on the internet. If you want there phone numbers I can email them to you. Happy Holidays Dennis Doiron snipped-for-privacy@earthlink.net- posted
20 years ago