Reagan would still beat him and lose to carter, given how unpopular Ford was and how strong Reagan and the hardliners were in the GOP. His primary victories were landslides, not even Ford could reverse that. However, the GOP could go down much worse than the narrow defeat IOTL, if they are more divided. This could alter the Carter presidency, but either way, Bush probably still beats baker and Dole and ends carter's presidency. I doubt that this PoD will make much difference.