Thank you! I could not figure out why the 55hp gain from and older engine, but the same stroke and bore. I appreciate your response.
I guess I will have to figure out which way to go, to get a little more hp.
My engine is very quiet, and solid. I honestly didn't want to not use it.
I see they "someone" out there makes a Holley 390? And maybe and HEI, and some headers. I don't know how much that combo would wake it up.