427 mid rise heads

does anyone know what all is gonna have to be done to a set of 427 mid rise heads to fit a 390?

 

You need to make sure that the intake valves don't rub the tops of the cylinder walls, and notch the block if they are too close. And also you need to make sure you use the correct med. riser rocker shaft stands and a med. riser intake manifold will need to be used.

 

alright thanks, thats exactally what i needed

 

How about some pictures of those heads if ya got'em??? Thanks!

 

Medium riser heads with 2.19" valves require too deep of a notch to work on a 4.05" bore block. They are usable with a notch on a 4.13" bore block. Low riser/428CJ heads with 2.09" valves will work on a 4.05" block without a notch, but the extra clearance will help breathing.

 

That's good to know!! Thanks for the info!

 

their on ebay rite now, the guy said hes gotta let them go just hollar at him he will make a deal after the auction is over
http://cgi.ebay.com/ebaymotors/ws/e...0618307669&ssPageName=ADME:X:eRTM:MOTORS:1123

 

Definiatly good info to have thanks