which heads for my custom application

[will2045]

hey guys im building a new 4.0 for my ranger. I have a 1995 bottom end with balanced crank, full done block and new rods and pistons (stock pistons) gaped rings for boost (pullied m90 but dont have the adapter intake yet). I have the 422 cam and now im at the heads. The idea has been building as fun of an engine as possible without killing my bank account. I have the 988 springs from comp but Ive read some issues with different head applications and i dont want to go guessing on a head set to use. so can anyone based on that and maybe which ones crack the least amount suggest a head? is there anything i can do to help prevent the notorious cracking? thanks again and sorry its another head thread just everyones application is unique and its too expensive to guess

 

[pcollins]

I don't think the 4.0L had major problems with heads cracking, it was the 2.9L that had that issue.

 

[will2045]

I don't think the 4.0L had major problems with heads cracking, it was the 2.9L that had that issue.

I'm pretty certain the 4.0s have problems too. I've had 3 sets magnafluxed and all 3 sets had a crank in one head or the other.

 

[RonD]

Yes, 4.0l heads cracked between valve seats, but usually only if overheated.....but it just took one time on some, lol.

But they are good heads if you will not be overheating them

Good upgrade stuff here
http://www.therangerstation.com/tech_library/4_0_Page.html