Hp/torque?

The "920" heads according to my book are 67 273/318 heads. In my earlier response I was a year off in what year the LA 318 came out. I thought it was 68 but according to my Mopar Perf. Small Block A Engine book it was 67. Again without knowing the cam It's nearly impossible to tell how much hp it is. I guess if I had a guess I'd say somewhere between 220 and 270. I know that's a broad range but that's about the best I can guess without more info. If you had head flow numbers, compression ratio and cam specs I could get pretty close. Do you know the weight and have a way to run it in the 1/4 mile and get an accurate speed in the 1/4 mile? If so you can use a calculator to get your approximate HP.

Here's a link to an online calculator

http://www.aspracing.com/dyno.htm