225 turbo headers

Ok, so much to read and so little time..lol You guys rock here, I'm proud to be a member. I think I will save the header money, keep the big carb, and do the J pipe turbo trick. Looks easy enough, may ask stupid questions later, for have never done turbo before. will do much research now. I do have the twinn turbos off a early 90s RX7, would one of these be a good candidate. Not going wild, just low boost street performance. Plus these turbos had no intercooler, just intake tube with large inline cone air filter leading to front of car.
Not a turbo header question, but unable to find a post to start with.
Does anyone know anything about DEC slant six headers? Website has no pics, and price seems a little low..Thanks in advance