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  Is a 289 block ok for a 331 kit?

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Author Topic:   Is a 289 block ok for a 331 kit?
V8 Thumper

Posts: 603
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 03-13-2002 12:30 PM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
I just spoke with Phil ('the man', suposedly) at Flatlander Racing about a 331 stroker kit... he said that a 289 block would have clearance issues with the 3.250" crank's counterweights. I'm not one to go questioning a pro, but is this true? I already have two 289 blocks, neither one is a HiPo casting, unfortunately. I'd rather not have to buy another block...

[This message has been edited by V8 Thumper (edited 03-13-2002).]

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Posts: 33
From: Lakewood, CO, USA
Registered: Jun 2001

posted 03-13-2002 02:10 PM     Click Here to See the Profile for JCQuinn@work   Click Here to Email JCQuinn@work     Edit/Delete Message   Reply w/Quote
As far as I know, other than bellhousing bolts (some 289s have 5 some have 6) the only difference is the lack of the extended cylinder skirt that a 302 has. It would seem to me that a 289 has more clearance.

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Posts: 719
From: Spencer, WV
Registered: Jan 2001

posted 03-13-2002 02:13 PM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
289 and pre 5.0 302 blocks are the same.

There will be no problems as long as the crank has the little cast-in ring on the rear flange next to where the rear main seal rides.

Good Luck!

Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3

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