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**Rich72C10** · 01-24-2021, 08:30 PM

It looks like my question(s) on seals was pretty much answered here in this thread Request: GM Valve spring experts

1. SBC 350 of 72 only rolled out with O-Rings
2. Later Umbrella seals came out (some used Fords). Both can be used at the same time.
3. If you add umbrellas, they would only be used on the intake side, I believe but unsure.
4. Unless the your old heads have been machined for positive seals, you can't use them.

01-24-2021, 08:30 PM	#2
Rich72C10 Mr. Cheyenne Join Date: Jun 2020 Location: Kyle, Texas Posts: 1,643	Re: 72 C10 SBC 350 - Valve Seals (Stock) It looks like my question(s) on seals was pretty much answered here in this thread Request: GM Valve spring experts 1. SBC 350 of 72 only rolled out with O-Rings 2. Later Umbrella seals came out (some used Fords). Both can be used at the same time. 3. If you add umbrellas, they would only be used on the intake side, I believe but unsure. 4. Unless the your old heads have been machined for positive seals, you can't use them. __________________ Richard *'72 Chevy C10 Cheyenne Super WHT/MED BRONZE/WHT SBC 350 \| TH350 \| LWB \| AC \| Buddy Seats Upgrades:** Tilt \| Front Sway Bar \| Radio \| Sliding Window \| Bed Spare w/Lock Bed Rails \| Full LEDs \| Courtesy Lights \| Tachometer \| Glovebox Lock & Light \| Head Light Relays \| *Upgraded Fully Super Trim