well this afternoon Beau and I decided to start my head swap. So far we are about halfway done, hardest part was the headers because I have to cut them off of the Y pipe but it's going fairly easy. Knock on Wood. No broken head bolts either. Tonight I will be prepping the block for re-assembly. Hope to have her fired up tomorrow afternoon some time. Wish us luck.

 

GOOD luck

you're gonna need it the way beau's luck has been lately

 

want are you putting on aftermarket heads or milled5.3 heads, and how much did you mill them, and good luck

 

they are 706 casting 5.3l heads with .040 milled off and a valve job. i wish i had 2000 dollars so i could afford some AFR heads but i'm not quite that fortunate.

 

UPDATE

just finished prepping the block. scraped down the old gasket material and i even got excited and took some scotch bright to all of the pistons to clean them up some. the only prepping left to do is chase the threads, and soak up all of the coolant out of the bolt holes. then when beau gets back, its re-assembly time with ls7 lifters, milled/worked heads, new oil pick up tube gasket, new used rockers, and a young man's prayer to rid himself of his UNGODLY tapping-esque noise.

 

hope everthing goes well, did they tell you what your compression is going to be now, and do you have to get shorter pushrods. yeah i wish i had $2000 for heads also, but i think i going to go your route also and get a set of 5.3 heads have them milled and a valve job. keep us update on the sotp results

 

Sounds pretty good. High compression is good for more low end power!

Side note, would AFR 205's work on a 5.3L? I would think they would lower CR too much?

 

yeah you would have to mill them down to get to 61cc just to get our stock cr. plus there made for the ls1 bore not the small bore of our lm7

 

i think you can get AFR-esque heads for our 5.3. it's about to fire up probably in a couple hours. just the spark plugs and wires, valve covers, and CAI. there is a weird connector though that i can't seem to find a mate for. on the top of the intake manifold but it's short and nothing is in reach. my compression should be about 10.4. the bitch of the install was getting the headers back on...if you want the story see "attention friends" in the southern section.

 

Probably the MAP sensor, cam position sensor, or oil pressure sensor those are the only ones in that area.