Slammed silverado

I want to put a set of 243's on my 5.3 the truck is a 2000, I had people tell me I need to mill them down to keep my compression the same, but will that make the intake fit wrong? I'm sorry if I'm miss interpreting this wrong, I plan on running a tbss intake, and is a lot to get them milled? Also could I just replace my Pistons with 4.8 pistons and keep my compression with out milling??

Vortec350ss

iTrader: (20)

Yes you could use 4.8 flat tops. Milling the heads shouldnt be too much of a problem unless you go too far. I forget how much you need to shave them down to keep compression the same...

Slammed silverado

Ok I think I'm just gunna use the flat tops cause I know you ha e to mill like .030 off I think, and I'm not sure how much that would be, I can prolly get flats tops cheaper than milling

George C....

For all that work just find a gen4 5.3

Slammed silverado

If I'm gunna by a motor I would just buy a 6.0 but I'm gunna work with what I got for now, I have access to all these parts fairly cheap

George C....

The cost of labor
Cost of balancing rotating assembly
Cost of bearings
Cost of 243s


Come in pricer then a full motor

Slammed silverado

Well I didn't think about that stuff this is my first build and I'm just trying to work with what I have, my original plan was to build a lq4 but I figured I would just build what I have, maybe I just need to throw the heads on and not worry about the compression, cause I am doin a cam (not sure what to run) tbss intake and I would like to run 243s, like I said maybe I won't worry about the compression then, I didn't know that all went into that, and again don't bash me to hard it's my first build, there's some things I just don't know, and trust me I ask a ton of questions and I wouldnt just throw this together, I want to do it right

George C....

Cut the heads .030 and toss them on..should bring you close to compression you were stock

Look to spend 100-250 to have heads cut, so add in cost of head gaskets..80...add in cost of head bolts if using stock 65....cost of heads 200-500...add in cost of springs 250.....add in push rods 100....add in cost of cam 375


Are you ready to go down this road

Slammed silverado

Ok thank you and I'm sorry if this is a dumb question but will there be any intake fitment issues? Thank you George for you patience and I'm sure you will see more of me on here

Slammed silverado

Yes I have been doin supporting mods for a cam, long tubes, bigger fuel pump, bigger injectors