It's dirty cruddy second grade cast ali of course it's a pig to weld, it's not like welding new cold rolled ali sheet it's got a fine sand like grain to it that just disappears when you push the weld pool at it. If it was easy then every body would do it.
Are you going for a new ECU, piggy back or just using the 13-14 deg retard timing trick with that set up?
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