1970 International Harvester Scout 800A. The game doesn't specify, but this is clearly a V8. IH offered a V8 in two sizes: 266 cid (4.4 L) and 304 cid (5.0 L). Despite AMC also offering a 304 V8 at the same time, the IH 304 is not an AMC engine. This being Forza, I'm betting this is the larger of the two engines. Considering the sort of hard work and abuse these engines saw, I doubt any IH engine bay looked this good for long.