any difference in cams?

[73 challenger 440]

I wanted to get a set of gear drives, as I am replacing my camshaft.. I was told some cams come with a one hole or a 3 hole where the top timing gear would attach. what are the difference for??

[Chryco Psycho]

3 bolt is used on more agressive cam profiles where the spring load is increased , personally wherever possible I order cams with 3 bolt

[73 challenger 440]

if I have a 1 hole cam, if I decide to grab a 3 hole, would the only change I would have to make is to get a 3 hole timing gear? everything else is the same?

[JS27N0B]

if I have a 1 hole cam, if I decide to grab a 3 hole, would the only change I would have to make is to get a 3 hole timing gear? everything else is the same?

Correct.  Hemis and 440 6paks came with 3 bolt cam gears but any B engine can use them providing there is a cam profile you like that is offered with the choice.

[73 challenger 440]

thanks for the information.