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I'm in overhaul mod and have seen afew comments about breaking valves.. I have old receipts from previous owners for new valves, and engine old cam was pretty wild. I am installing tamer cam with new springs and lifters. should I still worry about the valves breaking? Not doing this a second time.

Alan L.

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Alan L
Stock valve, YES YES AND YES.
Use single groove valves and keepers. After oil starvation, broken valve is the second most common cause of Cleveland death.

X3,a good quality 1pc valve with single groove keepers.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
X4 May be you already have them if the PO used a radical cam,they already new this.You need single groove locks / va;ves.

[Image: 16kuyc0.jpg]
current valves are 3-groove keepers

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Alan L
I cant remember if you have 2v or 4v but I had these in the previous motor and they are excellent. The 4v are about $110 a set of 16

[Image: mustangnight010.jpg]
1972 Mustang Convertible 351C 4V
1966 Ford Galaxie 7 litre-4speed

Ive had the stock 3 groove valves in mine for the last 7 years and they have done fine no problems, but I have a really small cam.

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Widowmaker00;11110 Wrote:Ive had the stock 3 groove valves in mine for the last 7 years and they have done fine no problems, but I have a really small cam.

I got away with it for along time also.I was lucky when one of mine broke I was in the pits at the track.I was warming the car up and reved the engine to clean it out.My intake valve on #5 let go.I had to sleeve that cylinder and clean the piston top up,broke roller rocker,springs,etc...I am just glad I was not at speed,would have been alot more damage.

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[Image: 16kuyc0.jpg]
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