The heads are pn 4556020, same 1.25" plug chrysler has used for 50 years. The block plugs are 1.39" p/n 6034804 cost about .35 cents they started showing in 1995, and fit Jeep 3.7L, 4.7L and even shows used on a V-10.

 

thanks ill just call them and tell them i need freezplugs in that diameter