97 351w heads on an 85 block? - Ford Truck Enthusiasts Forums

Notices

97 351w heads on an 85 block?

Reply

 
 
 
  #1  
Old 08-12-2018, 11:26 PM
BMW2
BMW2 is offline
Senior User
Thread Starter
Join Date: Oct 2002
Location: Mount Vernon, Washington
Posts: 164
BMW2 is starting off with a positive reputation.
97 351w heads on an 85 block?

Found a set of rebuilt 97 351w heads with roller rockers for a reasonable price. Any reason I can't use these on an 85 block with non roller lifters and a flat tappet cam?
 
Reply With Quote
  #2  
Old 08-13-2018, 12:14 PM
Conanski's Avatar
Conanski
Conanski is online now
Post Fiend
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 25,706
Conanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant future
No reason at all.
 
Reply With Quote
  #3  
Old 08-13-2018, 12:50 PM
Beanscoot
Beanscoot is offline
Posting Guru
Join Date: May 2007
Location: British Columbia
Posts: 1,794
Beanscoot is gaining momentum as a positive member of FTE.Beanscoot is gaining momentum as a positive member of FTE.
And use the '85 pushrods.
 
Reply With Quote
  #4  
Old 08-13-2018, 12:58 PM
baddad457
baddad457 is offline
Post Fiend
Join Date: May 2003
Location: south louisiana
Posts: 8,591
baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.
Use the roller rockers too. But as for the springs, you'll need to have the pressure/installed heights checked to see if they're compatible with your cam. Roller springs are stiffer than flat tappet springs. Only if the cam is spec'd for stiffer springs (high performance grind) should they be compatible with your cam.
 
Reply With Quote
  #5  
Old 08-13-2018, 01:36 PM
BMW2
BMW2 is offline
Senior User
Thread Starter
Join Date: Oct 2002
Location: Mount Vernon, Washington
Posts: 164
BMW2 is starting off with a positive reputation.
Cool. I heard the lifter bores in the roller blocks are bigger, just wanted to make sure there was nothing special with the heads.
 
Reply With Quote
  #6  
Old 08-13-2018, 02:32 PM
baddad457
baddad457 is offline
Post Fiend
Join Date: May 2003
Location: south louisiana
Posts: 8,591
baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.baddad457 has a great reputation on FTE.
Lifter bores are taller to accommodate the taller roller lifters, this doesn't affect anything running flat tappet lifters in them. All other dimensions of the blocks are the same
 
Reply With Quote
 
 
 


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.