About to dive into the LS swap

[alowerlevel]

If you can see the pistons or if you put something in the sparkplug hole and feel around, if it has flat top pistons its a 4.8 if they are dished its a 5.3

 

[6spdmalibu]

Or if worse comes to worse pull the heads and measure the bore. .

The 4.8 and the 5.3 share the same size bore. They differ in the stoke.

 

[MalibuRacing]

I highly recommend Jesse at Wait4Me Performance. I sent him my harness and ECM. He strips out what you don't need in the harness, labels everything and reprograms your ECM. I paid $300, but he may have gone up some since then. I believe there were only 8 or so wires you have to connect externally, such as fuel pump, power, ground, tach, etc....

 

[406Elcamino]

Well i got the harness today and it was the complete truck harness everything also got the comp as well. I can see why ppl might be overwelmed by this swap but when it comes time to actually doin the swap i will most likely send out the harness and comp like maliburacing has suggested.

ok got a few questions to.

can i swap the intake from an ls1 and does this effect the comp?

will the ls1/vette exhaust flow better then stocker truck manifolds and is there any i should look for to fit the gbody?

 

[blubaldmontess]

By memory, The truck manifolds flowed better than the car ones, thats why people use them on the turbo swap...

You can swap the intake from the ls1, yes, but you'll also need to swap the fuel rails, injectors, have the wiring harness adjusted for the different injectors, rework the top of the waterpump....its a whole lot of work, and there are a few ways to do it:

http://performancetrucks.net/forums/showthread.php?t=359987&highlight=ls6+intake

http://performancetrucks.net/forums/showthread.php?t=357424&highlight=ls6+intake

HTH

 

[406Elcamino]

I have been reading up tons about LS motors and if it wasn't for building another 406 i would really consider doing a 6L swap!.

thanks for that reply

ok got another question about transmission/bellhousing, I noticed that the block has 5/6 holes for the transmission to bolt up but what do you do about the odd ball that isn't drilled? i think its the passenger 2nd from bottom?

 

[StreetBu]

Leave it empty..

 

[406Elcamino]

Just wondering what i do about the transmission/converter and how to match tgem up?? I read about some kit u can order??

 

[Roller406Bu]

get a ls specific convertor or a ls swap flywheel from tci etc...its your choice which road you take..

 

[406Elcamino]

I think i will probably get the flexplate i checked tci's website but never found the part #? can anyone point me