is the 2003 lightning 5.4 block the same as a 2005 f15 5.4 block. i am wondering because i would like to get a jlp short block and put some custome build 3v heads on it. is this posible.

 

I belive the lightning block is aluminum and the 2005 block is cast Iron. other differences are forged pistons and a forged crank in the lightning.

 

far as i know, the blocks are the same still. its just everything intake is different now with the new 04-07 3v setup.

by the way, you didnt mention if you were going to try and SC a 3v?

 

The Lightning (and HD) block are not aluminum.
The 5.4 GT block is but very pricey.

You might want to consider the 4v Lincoln Navigator heads as they flow very well.

 

HI!... "97" - "02" 5.4 blocks are all the same. In 2003 FORD went to a NVH block which has 18LBS more material in it to make it stronger. It's just beefier, but has all the same internal dimensions as all the 5.4 cast iron blocks.

 

ok so i can buy a jlp short block and get a set of preformance 3v heads an im set. oh ya i am going to be puting a whipple on it. will it still work

 

whipple for a 3v? i dont follow the 3v scene much but uh. that leaves some intake parts other than the SC being needed doesnt it? like intake manifold, IC?

 

ok heres what i want to do. i think i did not exsplain my self right. i have a 2005 f150 with a whipple on it. i just want to buy a short block this winter from lets say jlp (jlp only specifies the lightning 5.4 short block) i want the jlp short block and a set of decent 3v heads for that block. i just want to have some peace of mind. i have big plans for my truck. im new to the whole truck sceen. i would just rather buy a short block from the pros than have some mechanic build mine. make sence now.

 

yes yes it does... JLP is a good build, pricey imo. also have you considered sending your 3v heads off to be port n polished?

go forged bottom end and your good within a reason... i think 750 hp crank is the margin where you start to double check your build

 

ya i planed on get my head done. you know any one good. how about some cams. like i said i dont know to much. i have talked to jlp. they do seem to know there stuff.

 

these boys did my 2v heads... havent built the engine to show their stuff myself yet but they do have some info on their work with 3v's

http://foxlakeracing.com/index.php?s...linder%20Heads