ahem, it costs almost a bare minimum of around 10k to ls1 swap an rx7, and that is honestly bare minimum, I personally know someone who did it all by themselves and it cost them 10k AFTER selling their 13b-rew set up, it is NOT a drop in engine AT ALL you will have to either custom fab a subframe or buy one, you will have to re-wire everything, you will have to make motor mounts, go with a different oil pump set up (I think), custom made drive shaft, you will want a new diff. because the n/a fc won't handle that torque, you will have to re-work the steering rack unless you want to have ridiculous bump steering problems... Please trust me on this, if you decide to try and wing this shit, it's not gonna work worth a damn and you will just end up ruining a perfectly good 7, Matt's FC is clean as hell, not worth fucking up if you aren't going to do it right...