Join Date: Dec 2012
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A few 400 blocks made one year 70 or 71 had the small block bolt pattern, I've never seen one.
The rest of the thousands of 351M and 400's had the exact same bolt pattern as the 429/460.
You 79 F-250 has the big block bell housing, I know this because I had a 79 F-150 originally 400 4 spd truck with a 429 engine bolted to the 400 bell housing.
Mine-04 F-450 SCFB 4X4 drw,5.9 12v 215 Ppump,ZF 6,KYclutch,KDP fixed,gauges,5x12's,15deg,3k GSK,60#,AFC Live, Super B single,Pusher intake,D celebrator brake,07 coil spring front conversion.
Her's-18 F-150 STX SC, 4x4, 5.0
Toy- 64 Fairlane, future 406FE, 3 Holley 2bbls, 4 spd