400/450 stroker....Cheap parts, lotta work.

IQ52 said
Days ago while I was changing jets on the 450 for another run a friend showed up who had never witnessed a dyno run. Had him stand just behind my left shoulder while we made the pull.

Afterwards I looked back to get his impression.

Not there...........he was twenty feet away across the shop hunched down some with big wide eyes.

"I thought it was going to blow up!"
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I can relate, back in the early 80s I worked at a foreign auto shop. The owners were involved in IMSA racing and had a DATSUN sedan. I was the engine builder and we took it to a shop in our area that had a engine dyno….as the rpm went up I started backing up…good memories.