e30 autox car. v8 vs s52 vs m52 turbo

[rThor432]

don't waste you time on a vert get a hard top and drop an LSx in it.

[Zya8187]

don't waste you time on a vert get a hard top and drop an LSx in it.

[whiltebeitel]

an LS1 weighs less than an S50, and it moves the center of mass back.

[papajetta]

i have an e30 which i plan on using as a dedicated auto x car. i plan on going all out on suspension and rubbers, only downfall is that its a vert, but i can always change it if it flexs too much, however. i know the perfect auto x engine would be a v8 due to its brutal low end torque ( which is my main concern when choosing the powertrain ), however a v8 swap would be a bit complicated, not to mention the weight balance being thrown off sooo much in the front.
i am undecided between a s50/s52 or turboing a m52.
- s50/52 getting my hands on 1 is starting to get expensive.
- m52 turbo would end up being cheaper, just concerned about the lag even if i go with small turbo running low boost.

just wanted to get some feedback on which 1 of the 2 options would simulate a v8 closer ( when it comess down to that low end torque ).
you know what i mean autox guys, when ur going through a slalom and ur getting that instant power from blipping the throttle.