making a turbo manifold isn't hard(if you're handy with a welder.)my son-in-law has a holden "red" six(like a scaled down version of the chev 292)and he got an old set of headers from a swap meet,cut the pipes off around 4"-5" from the head(give enough to clear the inlet manifold)and then welded a 3"X3" steel box tube (3mm thick) section on to them.cut the hole for the turbo and then welded another 3mm plate over the hole(cut ot of course)to give some more meat to drill and tap stud holes(3/8") to bolt down the turbo.made the entire manifold in a few hours, with a total cost of less than $60.still on the motor and still making 15lb's of boost!
