Hy Tommy, as your truck could have come with a V8 from the factory, and all the required parts to convert it are available either used or in the aftermarket, it should be a fairly easy swap once you have all the parts. However the H.E.I. distributor will not clear the factory firewall without modifying the firewall for clearance, one other point, some of the more performance V8s have large diameter harmonic balancers which would require modifications to the factory front mounts for clearance around that style of balancer, your 307 probably does not have that style of large balancer, hope that helps.
