Thanks. All was set for the exhaust today but the battery had other ideas. High comp 2L killed it very quickly. I have replaced it with a Century 360CCA, ultra high performance. The cables I had been using were about 16mm2. Too small for the bosch starter!! So now there's 25mm2 cables run in with the 16's, soldered together into 35mm2 lugs. It's made a massive difference to the cranking. I highly advise anyone with a pinto to check the cable sizes and go for at least 35mm2. These pinto starters need a lot of current.