None had forged internals beside the crank. That was dependent on year, make, and factory

 

That's what I meant by that, for the crank. Do you know which factories had what? Cause I'm kinda curious to know what my 97 has..

 

Only about 10 months and a week until the meet. Can't wait to meet all of you & get some pics. Gonna be fantastic!

 

It's a good question cman. But the truth is nobody knows. It's hit & miss. Only sure way is to check your crank.

 

Ahh okay. Well that's not going to happen any time soon then unless for whatever reason I need to drop the pan for something. And if that's the case then there's probably more problems than that lol. How many different factories were the 5.4s made in? I know the trucks were made I. A bunch of different factories cause my truck came out of the Norfolk VA factory but how many for the motors?

 

97/98 Had cast crank, pmr rod, cast pistons flat top pistons with no valve reliefs.

 

Ah okay so is forged better than cast? How much power can a cast crank handle? What are you running in your 97? Cast or did you swap it out?

 

 

I have a Forged crank from a L. Also have PMR rods from a L, but have Mahle forged pistons.

 

Since we are talking pi swaps. If I were to take a 98 lower that is in good shape and swap out my heads and intake. 1) would I need to have a custom tune 2) what grade gas would be my minimum 3) what numbers could be realistically expected?