Correct me if I’m wrong, but my understanding is “Block filler” was designed & intended for Drag racing use only.
Specifically for Methanol, (Alcohol) burning engines.
Adds rigidity & stiffness to the block.
Drag racing engines do not need much in the way of cooling when running Methanol as this fuel runs so cold & gives anti-detonation benefits, thus higher compressions can be run.
Drag racing engines also only run for several seconds or at the very most a few minutes & require much less cooling.
A street engine has cylinder cooling passages for good reason.
Pantera’s have never been the best for staying cool, the last thing I’d be doing was making the situation worse.
Regards,
Tony
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