Thoughts on early vs. late Slants.
You can also use a later magnum style roller bearing pilot bearing that sits in the crank register bore instead of inside like the older caveman style..
Also you won’t feel any difference between those two engines, the horsepower would be 5hp-10hp + or -. get a good distributor recurve and a super six set up or make one. You can do other things but these would be the cheapest and easiest.
You can also use a later magnum style roller bearing pilot bearing that sits in the crank register bore instead of inside like the older caveman style..
Also you won’t feel any difference between those two engines, the horsepower would be 5hp-10hp + or -. get a good distributor recurve and a super six set up or make one. You can do other things but these would be the cheapest and easiest.