Ls1?

[RVMS]

Soooo basically from my understanding the 5.7 block is the same as an ls1, minus the aluminum. Same motor mout points and all. Am I wong?

 

[JKmotorsports]

The LS1 is a completely different block from the GenI and II motors. Structural architecture and dimensions are different. I think the ONLY thing in common besides the 5.7L displacement is the crank journal diameters. Other than that, everything else is different.

 

[AquinoSteven]

Alot of people looking to upgrade the 5.3s bore it and make an iron LS1 using all the LS1 internals. Thats the closest youll get to a similar motor other then an LS6

 

[blueflamed03]

but, if your planning to swap one in, a good 5.3 or even 6.0 can be had for cheaper.
If you opt for 6.0, you have 350 cu in versus 370 cu in.

 

[RVMS]

thanks... i had a feeling it was worth looking into. thank you tons.

 

[retorq]

The LS1 is a completely different block from the GenI and II motors. Structural architecture and dimensions are different. I think the ONLY thing in common besides the 5.7L displacement is the crank journal diameters. Other than that, everything else is different.

I thought the cam bearings are the same too ..