I need help. Right now I have a newer 350 create motor with tpi and I am going to a zz4 motor soon. This is where my problem begins. I have seen allot of zz4s with tpis but that seems to be a little mismatched tpi lower rpms, zz4 high rpms. So what should I go with LT-1 or HSR? Please Help
Thanks
Mark

 

Lot's of people like the LT1 conversion. I personally am a big fan of the HSR. Both will flow well beyond the long tube TPI.

The LT1 conversion requires that remote thermostat, and I think it looks ugly, plus even for all the successful conversions, people still occassionally run into problems.