Engine Gallery

Pleasurecraft Marine (PCM) Ford 1986

Commander 351

1985 Commander 351 FWC

Escort 302

Indmar Ford

1994 PCM 351 PTI

PCM GT40 MPI Bobtail

Indmar GM Carbureted

PCM 454

1995 Indmar LT1

Indmar 454

1996 Indmar Monsoon I

2000 Indmar LTR

2004 Marine Power 335

2006 Indmar MCX

Mercruiser Mag MPI

351 Ford High Output (H.O.) Cylinder Head

Indicated by 3 raised ribs on the end of the head.

2 raised ribs indicates a standard 351, 250HP with hardened exhaust seats.

A flat head, with no raised ribs, indicates a older style without hardened seats, requiring Valve Tech or a lead substitute.

Flat Head and 2-rib heads are compatible, just make sure both take 14mm plugs.