are these alright heads

Sorry yes 906... one of them numbers floatin around in ma head lost a 1:-D

Excellent on the flow! I was not sure how close, Thank you

Hmmm acording to what I have here the 452 was on 400 and 440's from 1976 to 78. I have a feeling that this may have been a transplant into the motorhome... Rob67 could that be????