dusty

So i have my turbo and intercooler and a bunch of other pieces to put a turbo on my 96 lexus lx450. (just a landcruiser with a gold L on front). it is a 4.5L inline six. the front of my lexus is all disassembled for the install. I got the oil cooler on. I still need an exhaust manifold and there is a plumbing shop here in town with all kinds of weld els. But I know the supras have inline sixes and there are a shat load of cheap supra turbo manifolds on ebay. I think it may be easier to modify a supra manifold (adaptor plate or cut off supra engine flange and bring supra pipes to the flange on my lexus)
I need someone to measure the aproximate distance from the the center of exhaust port one to the center of port 6. also what is the exhaust port diameter?
Also, is there a diff in the distance between port 1 and 6 with the supras in the 80's and 90's?

please help and so I can post wicked pics of build and of my lexus humping Hemis