just put a 89 377 in a 86 cougar. runs good with out a load but just had it out ran it for hour or so. then started to cut out itermittent. seems like when it got hot it started acting funny. but then i let it cool, still when you get on it cuts out then dies or really hard to stay running gota to prime like crazy the hole bit. just put a carb on and coil wonder were i sould be looking cdi box or stator allso using the old dual carb fuel pump have one side blocked off could be prob. any help app. thanks fanatics.