My old school 340 upgrades and results.

j par said

Bad ignition ? Wires ? rotor? Cap?
Wow, it's been popping @5200 for 20 years!?!
A drag car !?!

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Yes it was always shifted right at 5 and ran low 12s . My thinking is the cam is just s just hitting the sweet spot when you shift. The dragstrip it used to run at closed down in 2005. Hasn't been rn down the track since then.