71 Dart 410 stroker ..

What ever it takes transmission has a large selection of individual parts....steel or teflon sealing rings..

Joe from Transzact recommends the teflon seals also....guy taking a second look at the trans for me does not...he builds and services alot of nhra stocker trans here in Vegas...plus he was a Chrysler mechanic for 30 yrs.....so your choice...
the teflon seal on this was not entirely their fault...i used bearing grease instead of vasoline to hold them in the groove....bearing grease kept them packed down in the groove..and not let them seal....but..I know the steel ones work so for now it steel...