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michael mercer · 04-17-2014, 08:29 PM

I have a 63 falcon sprint with the 260 that my dad bought new in 63. The problem with the 260 is the hp rating of 164. Nhra has reduced it to 158. It needs to be at 138. IHRA has reduced it to 145. The 63 260 has smaller valves than the 64, but has the same hp rating. With the 289, I am not sure if you have to run the 5 bolt block or not. I think ihra has reduced the 289 hipo rating for pure stock. You might want to contact Alex Denysenko, I think he was the one who got ihra to defactor the 289.

04-17-2014, 08:29 PM	#2
michael mercer Junior Member Join Date: Jan 2003 Location: southern illinois Posts: 49 Likes: 7 Liked 2 Times in 2 Posts	Re: Another new combo question I have a 63 falcon sprint with the 260 that my dad bought new in 63. The problem with the 260 is the hp rating of 164. Nhra has reduced it to 158. It needs to be at 138. IHRA has reduced it to 145. The 63 260 has smaller valves than the 64, but has the same hp rating. With the 289, I am not sure if you have to run the 5 bolt block or not. I think ihra has reduced the 289 hipo rating for pure stock. You might want to contact Alex Denysenko, I think he was the one who got ihra to defactor the 289.