Which rockers to use??!!

I also used the 273 adjustable rockers on my 340 Dart 4-speed car that ran 11.90's back in the early 80's. Like was said.......use them they will be fine. My son also uses Crane iron adjutable rockers on his 400 in his Dart and they work fine. And the price was right as we got them for free since we did my buddy a favor ! Ron