[V]

Why do 98 ls1s get a bad rap when it comes to being compared to later models?

I know people claim "weaker" rod bolts,

diff ecm/harness BUT what is truly different? Is it worth swapping to a 99+ harness ecm?

Metal fuel tank

whole coolant temp is 3 wire?? and fuel sender wont work with newer ecms etc.

heads are diff


--My plan is to use a 98 drivetrain as a swap.

I have 241 heads id be using, Then getting ARP rodbolts, custom cam valvetrain etc. electric water-pump, new intake and TB as well.

I'd basically be using the 98 shortblock, oil pan, transmission(t56), ignition coils and front accessories. I just dont know what I should do about the harness ecm. I THINK i have a 2000 ls1 auto harness laying around I could use and repin the t56 wiring from the 98 harness into it, and then just buy a 99+ ecm.

I just dont know the details about why people really hate the 98s electronics. the motor will be a cam/bolt on, nothing insane, and will be tuned using hptuners.