Help! How to Mod a OMC Looper V4 Heads

[DonChicho]

Help!, I would like to know how to MOD a stock set of Heads of OMC V4,Looper,140H.P.,1986 .
Using a 95 RON,Unleaded Gas.
Any HELP, will be appreciate!.

Thanks,
DON

[Instigator]

make sure it's actually a looper
would have guessed no being a '86??
If it's a cross flow, I'm not the one to help you.
If it's a looper and the heads are the same chamber design as the 6's then you probably want the early ones with the smaller chambers which you may already have.
If so, then you want to deck them to some where around .675" deoth which should still allow you to run pump gas.
Don't take my word on it though.
Wait for some one else to confirm/correct what I have said/guessed.
Good luck.
Gary