Bwboley

Hello new here and this will be my first build and going in a 70 c10 2wd in bags.
i got a rolled over 06 tahoe with a 5.3
i just stripped it down to get the crank polished and new rings and bearings added.

In looking at the btr stage 4 cam (also looking for recommendations)

Currently has 862 heads but i found some 243 heads should i swap? And will the stock springs on the 243 heads work with that cam? And will i need to mill the heads?

This already has flat top pistons but was thinking about punching it out and putting ls1 pistons in it

also looking for tbss intake

Which timing set, oil pump, lifters would you run?

1FastBrick

iTrader: (17)

That looks like a 4.8L with the flat top pistons. A 5.3L would have a dish piston.

Pull the pan and the windage tray and look at the casting number on the crank.

12553482 is used exclusively on a 4.8L with a 3.268 stroke
12552216 is a 5.3L or other LS V8 with the 3.622 stroke

Bwboley

You know what it is a 4.8l hmm that changes it up some.

1FastBrick

iTrader: (17)

It will definitely affect the cam choice for sure.

Bwboley

i have a friend with a 5.3 block i may just grab the crank and rods. It had a bad head so they just bought another 5.3

1FastBrick

iTrader: (17)

Do you know the year of that engine?

Bwboley

i believe 03, ill have to double check
if it will work
243, flat top pistons from the 4.8 and 5.3 crank/rod.
And it will basically be a l33.

1FastBrick

iTrader: (17)

Exactly why I asked!!! If an 03 it will be press pin though. you would have to locate some floating pin rods. the 4.8L are longer and will not work

Bwboley

Are the 5.3l intakes from the 2010 pu same as tbss?

shakenfake

Yes they are