Hi David, I actually have a Sievert set with 3 different burners. The biggest one they do still would not do the job adequately as it needs to be an even heat throughout the job. I could get it to go at one end but not at both ends at the same time
I have done the sensible thing and given up
I am going to go with an original manifold and then look at something totally different and possible bikeish later
I saw that video on you tube with the blackbird engined car. Very tempting.....