S-Chassis.com - is there a exhaust manifold for my T04??

i have a t04 AiResearch turbo. A/R .60 on intake side and A/R 1.15 on the exhaust side. ill try to post a pic of the exhaust side if i can get it to work. insted of the downpipe(right word?) bolting up to the exhaust side, it has to slide over the circle flange thats around the turbine. anyways the measurement of the bracket on the turbo that bolts to the manifold is 4 1/4"x3 13/16(just over 3 3/4). i still dont know everything about 240s but i think i like the 95-98 240sx coupe. If anyone knows if theres a exhaust manifold for the 95-98 240sx that i can bolt my turbo to, id like to know. also isnt the AR ratio of the exhaust manifold pretty large. will this thing be a lag monster? what psi do you have to run to get to 270 hp?(considering other needed mods) that would be my power goal.