i have a 1993 240sx coupe and i am installing the turbo kit on the KA have a couple questions. for one the down pipe wont bolt up because of one of the brake lines on the master cyl. also whats better to put the maf on the non boosted side or boosted side.

Which turbo kit? The manifold determines placement of turbo in relation to BMC, so have had issues with being to close to it.

MAF placement for draw through or blow through is kind of personal preference. Blow through will allow you to run after you happen to blow a coupler, Draw through you would probably want to recirc the bov. Etc, etc.

I've been a blow through fan for some years now, and recent went to draw through and recirc, I will probably never go back to blow through. I noticed you will max a maf out faster, my z32 maf at 7psi was reading 4.1 volts on the datascan. I know I was not making (rough estimate) 400hp... On draw through its reading around 3.8

what kit?
remove the bmc install the dp and reinstall the bmc. Make a heat shield or wrap the thing good to keep heat away from brake components! I recently melted the internals on my brake booster.

it is a cast manifold. also what do u think about running stock maf if only gonna go to about 8-10 psi. and its a kit i bought from some1 and i think its a ebay kit bc it came wit a chineese turbo but he also gave me a t4/t3 twin scroll with it

What is the tuning? Usually stock maf will only go to about 5-6psi.