I forgot to add, that's if you want to fit an aftermarket ECU like Microtech, MoTec, Autronic's etc without a cat. convertor too. You could fit say a 20VT out of a 98 Passat into a 80 GLS, but you'd also have to fit every bit of factory engine managment, pollution gear etc. that the Passat came out with.
Then it would also have to have a very expensive pollution test too! This isn't only just for the exhaust, it's everything from fuel vapour's, carbon canistor's etc.
My info comes from a very well respected engineer. I was speaking to him about engine conversion's & he said as long as it's badged a 76 you could fit one of those engine's with an aftermarket ECU.
Hope this clear's it up alittle.
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