[Mike C]

Technically it's not a numbers matching #. It may be appropriate engine for a 1970 truck, but it only matches one truck, the one it came out of as far as "numbers matching". And $300-$400 seems to be about right price was. Especially if it still has everything on it: carb, distributor, pulleys, brackets, exhaust manifolds, etc.

If it was well maintained, 90k miles isn't that much even on a 1970 motor. My Jimmy had 113k on it when my Dad bought it in 1977 and 248k when I got it from him in 1988. And 252k when the timing chain broke...

I have a '69 short step with a 307 and 56k miles and the motor is exceptionally clean and well running. The '76 Caprice my Grandfather drove to the bank a block and a half away from his house had 46k miles on it when we pulled the motor out and it was so sludged up from short trips it had a second "valve cover" underneath the regular one made out of deposits!