What Rpm Are U Spinning 365 Mag
 

I am wondering if anyone is turning over 5000 rpm with stock 365 454 mag with small mods like headers and intake ?

Also what seems to be the hot intake on these things I'm running a victor jr.. and stock carb?

i had that motor in a 89 checkmate,comp. cam,
team g intake,850 holley,stainless marine headers,merlin heads,spun that motor with its stock lower end 5400rpm
all day long.spun a bearing at 450 hrs.i got my money out
of that motor.

I used to spin 5200 with mine.. and it ended up with broken valve springs and a cracked valve.. So if it has stock springs keep it under 5k. Thats what they told me at the time. With new one piece SS valves and new springs.. i wound it up...
Ended up with a 513" motor that would turn 6300... but they don't last long at that level.. *S*