BOSS // 302 Thunderbolt project

flaymon1 · Jan 25, 2008

Does anyone know if there is a visual difference between the 351c heads and the 351w heads so i may be able to spot the right head easier at the local Pic A Part.

Hjcraver · Jan 25, 2008

351 Heads

Its easy to recognize but hard to explain. Go to Ebay and look at both styles.

v-8power · Jan 25, 2008

Does the valve cover have a different bolt pattern or number of bolts? Just curious

flaymon1 · Jan 25, 2008

supermonkey · Jan 25, 2008

Okay,here goes.Cleveland head-stand to one wside of the engine and ook at the upper corner of the head next to the valve cover rail.You will see a 2,a 4,or an "M" cast into it.The exhaust side headbolts are taller than the ports.The engine itself has a flat shhetmetal front cover with the water pump bolted to it.The water neck bolts to the block.With v/c off,valves are staggered.Windsor-no visible mark.the exhust side headbolts are short and run under the exhaust manifold.Front of engine looks like 302.Water neck bolts to intake.Valves are inline.

Mac · Jan 25, 2008

Valve cover bolts will tell it all as to what engine series it is. 289-351 small block will have six bolts, seven bolts is the FE series and eight bolts is the boss 302, 351C and the M series engine. Best and easiest way from five feet away.
Dave

baddad457 · Jan 26, 2008

supermonkey said:
Okay,here goes.Cleveland head-stand to one wside of the engine and ook at the upper corner of the head next to the valve cover rail.You will see a 2,a 4,or an "M" cast into it..Windsor-no visible mark.the exhust side headbolts are short and run under the exhaust manifold.Front of engine looks like 302.Water neck bolts to intake.Valves are inline.

The 86--up Windsor heads have one of these three charaters cast in one corner next to the valve cover(same as a Cleveland): "T" denotes an E7TE head. "S" denotes an E6SE head. "P" denotes a GT40P head. Plus the P"P heads and the regular iron GT40 heads have vertical bars cast into the ends of the head. All this is moot anyway, there's damn near a zero chance he'll find Boss 302 heads in a junkyard today. And almost as close a chance of finding 351C heads too. The later "M" heads are nearly dried up as well.

pud · Jan 27, 2008

windsor valve covers are also more oval shaped, where the M/C valve covers are nearly perfect rectangles with only slightly rounded corners.

Big John · Jan 31, 2008

351w exhaust bolts straight across side to side from each other, 351c exhaust bolts corner to corner.

BOSS // 302 Thunderbolt project

flaymon1

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