Probably a dumb question that it seems i may have the answer to but i'm putting my wires back on my Port 454 standard rotation (not sure if that means LH, RH, clockwise or counterclockwise I get so confused) but I'm confirming the firing order... it appears that both engines port and starboard have the same firing order stamped on the engine (13572468) but the distributor have different firing order per the manual which i attached - and it appears that the left motor (which i can only assume they would put the port motor on the left in this diagram) has a firing order on the distributor of 12756348.
My question? Does it matter where the 1 starts on the distributor? Or per my picture, should i start it at the top left of the cap?
Just confirming, for my port engine,
engine firing order 13572468 (counter clockwise from top left when looking at motor from above)
distributor firing order 12756348 (counter clockwise from top left?)
Whitney,
Unfortunately your photo shows the issue with using automotive distributors on a boat. Marine distributors have flame arresting screens on the vents to make them ignition proof for use in the engine room of a gasoline powered boat. That vent notch under the cap that I have circled on your distributor is fully open with no screening.
You may be better off replacing those old Accel HEIs with some new aftermarket distributors intended for marine use. Something reasonably priced like these: https://www.amazon.com/Team-Performance-Electronic-Distributor-Pleasurecraft/dp/B07MF4WZSR/ref=sr_1_1_sspa?crid=UOHJKEJ1BB12&dib=eyJ2IjoiMSJ9.VrtvhIejv5_fTd7WaCVey4clSBwSw1O-p0051zuStQFJsSesSizhrP-bCc7Y5u9eEYbo000wL-D67ZDndijCWgTgphWApu1OvuA0oAm_dNVNAlhJUaEY6bVQU72KGoi11U-d9dHt4y6JdZHEVZiCP2BIP5UkNkmkQeFuGY1P68pSkUjfSz65q2ic45YSqCRgdsxoV3i3YooGcUO2Dn2zFEJJwYJ_qCnGLXsIM6WEwmo.4rcP6zkg0F74C71oYud005q6UHDjQrzY8IVPrDaOVw0&dib_tag=se&keywords=gm%2Bv8%2Bhei%2Bmarine&qid=1747838187&sprefix=gm%2Bv8%2Bhei%2Bmarine%2Caps%2C94&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1