If you use the Fiat twin cam 84mm block (124, 131, 132, Argenta, Spider) and corresponding Colotti or Borg Warner Fiat Gearbox and a custom driveshaft you can mate the Alfa Twin Spark head on to it as I believe you will find that bore centres and head bolt positions are the same. You would need to do some modifications to pistons, waterways, and possibly the oil feed to the VCT but none of which is a big deal really. My issue is that here in Australia a 147/156 front cut to source the parts from is ridiculously priced when you consider the real world useable horsepower and ease of fitment from a 75TS for less money.
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