Debating between lq9 or lm7

[PitchBlackC3]

LQ4 or LQ9 would be cheaper than making a 5.3 a 5.7.

[408.Luke]

i would go with a lq9 or lq4 leaves alot more options open for the future. 408, 414, and you can use l92's

[Wtfan18]

im pretty sure a stock lq9 with a t56 would put you close to your goal, add a few boltons and a cam and youll be good to go, plus youll appreciate the extra torque and displacement, i had a 5.3 t-56 and after a couple months i was bored and wanting a 6.0. just spend it now and save yourself a motor swap and changing parts later.

[Frenchy]

I would've gone 6.0 but I got a deal on my 5.3. Besides if I went 6.0 there would be pieces of NV3500 everywhere, it should live a little while behind a the 5.3.

[ratedx]

LQ4 or LQ9 would be cheaper than making a 5.3 a 5.7.

I'd concider the lq4 but would rather go with the lq9 for the lower compresion and flat top pistons that would be better for boost or spray (plans for the future future). Although the lq4 is cheaper would it be wise to later change the compresion ratio suitable for my application since they both have 317 head correct?

[jetmech]

If you're only after 400rwhp, then I'd go with the 5.3L. My 4.8L runs close to 500rwhp, probably over 500rwhp, with a turbo and a few supporting mods. So it wouldn't be difficult at all to make 400+ with a 5.3L.