Something I'd like to throw out there, your '77 slant stock horse is 100hp @4000RPM. In the later 60's (64-71) the HP is 145 @4000RPM. Check out this site: http://www.allpar.com/slant6.html (also lists the differences in HP, other, over the years)
I've gotten a '75 slant with a 904 trans for...