1999 starter to 68 dart

Somewhere on here I have read u can use a newer style starter off of a Dakota 5.2 on an older engine but I can't find it now. Well I just bought a 1999 starter from autozone and it has a little plastic piece to receive a little plug of sort and a prong like a regular starter. The starter is tiny compared to my original starter and at least half the weight, and looks like it's going to be easy to get to with headers on. Is this the style of starter used to replace old style as I don't have the plug to adapt to the plastic piece on the starter. Did I get the wrong year of starter? is there one of these smaller starters with a 2 prong style?