Hey guys I'm being offered 2 engines for slightly different price but can't decide which one is better for the buck. Choice one: jdmsource approxly 50km in engine all in included 3200$ and my friend would install it. I'll be giving him my d16z6 + some cash. Choice two: 90km GSR with itr cams, DC header and I think aftermarket intake manifold 4000$ for this installed. I can't decidewhether this mode are worth the difference in price or not. I always liked to start stock and do my own thing. What you think?