That is correct. The spool mounts can't be shimmed up without a lot of cobbling to make it happen. If you use Dougs D453's and a mini starter as @TrailBeast suggested, you won't have any problems. I have gone to Autozone and bought 4 or 5 mini starters for a 92 Dodge B200 van with a 5.2 engine. About the 3rd one, they counter guy asked me, "How many damn Dodge vans do you have?!?" LOL. I use them on everything. They spin fast and don't sound like a cat with its tail hung in a washing machine ringer!