[92notch]

I have a set of SVO C3 heads and an M9424 A351 roush Intake. I do not know if I should use them to build a motor or sell them. If I sell them I am not sure of the value. Can anyone shed some light on this subject for me. Thanks

[stlwagon]

Welcome... Let's see what the 2.3 guys can tell us.

[clypsogreen93]

how much you want for them??? lol, basically you can get a few bucks off of them if you repost this in the 2.3 svo forum section.... i actually wouldnt mind having them!!!!

[cindys_sn95]

come on guys, yates, nascar, SVO. these geads are for hard core 351 based engines! have seen them on ebay for 2000-2500.00 without intake! they would make a killer combo, but not very streetable/user friendly. the c3s were first made in 92-93 i think. very outdated for currant nascar, but lots of h.p. for anything else.

[RLG34750]

It would be fun to put one on a 2.3 .....

But here is the real story.......

Ford Motorsport (SVO) Yates heads are designed for a max effort racing engine. There are currently 3 different style castings for a Yates head:

The C3,C3L and C35 are Conventional YATES cylinder heads with standard castings. These heads are usually low compression when new and come from the factory with 67 cc chambers. They were designed for “all out racing” including Drag, Circle Track and Sprint Car applications. Utilizes shaft mounted rocker system but you have to be sure which one you need (one piece mount or multiple ).Typically came with Titanium 1.60” exhaust and 2.1” Intake valves. They have added water passages between combustion chambers and utilize AGS series spark plugs.

The C3H “High-Port” is similar to the standard C3 casting but has raised intake runners with a straight in intake bolt pattern (bolt holes are perpendicular to the head). Fits 302 and 351 SVO Ford blocks and come new with 40 cc combustion chambers. They were designed for “all out racing” including Drag, Circle Track and Sprint Car applications. Typically came with Titanium 1.60” x 5.26” exhaust and 2.1” x 5.45” Intake valves. This head uses the same shaft mount rocker system as the C3L but longer pushrods. Exhaust ports are the same as the C3L and utilize AGS series spark plugs.

The SC1 is a "all new" Yates casting with raised intake and exhaust runners ( ,40” over the C3L heads). Which creates better airflow and greater horsepower. Fits 302 and 351 SVO Ford Racing Blocks. This head also incorporates extra material for higher flowing port designs. Intake valves go up to 2.180” x 5.685” and exhaust go up to 1.625” x 5.565”. Uses M-9424-W352 Intake manifold and AGS series spark plugs.

Most all are machined for shaft mounted rocker assemblies (Jesel or T & D) but some use 1 piece stands and some use multiple piece stands.