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au03z71 · 04-26-2010, 12:27 PM

I have a 383 with the XR276HR and Vortec heads. I'd like to know this too, but I think it's going to be around 425 hp/450 ft-lbs.

04-26-2010, 12:27 PM	#2
au03z71 Registered User Join Date: Jul 2006 Location: alabama Posts: 647	Re: Comp 276hr in 383 I have a 383 with the XR276HR and Vortec heads. I'd like to know this too, but I think it's going to be around 425 hp/450 ft-lbs.