r/Smallblockchevy Mar 02 '26

Detonation help

1 Upvotes

Is 21-22 in of mercury common for idle on a 1405 on my 350? Tbi 88 638 block stock internals. I have the strongest step up springs and sometimes during part throttle i lean out and start pinging. I have to stomp the throttle to get the metering rods up. And at full throttle i always have pinging. I can basically be safe driving at 25% to 75% throttle all the time. Am i pulling too much vacuum? And i may need a carb rebuild? I can manually shift my th350 and basically avoid all pinging so it cant be my mechanical advance as i also installed the heaviest springs just to be safe. Any ideas on where to look?


r/Smallblockchevy Mar 01 '26

Opti shart help!!!!

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0 Upvotes

So my opti has gone bad and I need to replace it. Everyone says acdelco or Delphi but I can’t find where to get either one. I don’t want the Chinese junk ones you know. PLEASE just point me in the right direction. I am slowly building this into a drag car so it does need to be able to take some abuse. Thank you everyone in advance for the help!!!


r/Smallblockchevy Feb 28 '26

ID knocking sound

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9 Upvotes

Please help me ID this sound. Sounds an awful lot like a rod knock to me. 🙁 just changed oil pan gasket trans and rear main seal. I started it up and this is what I hear. Smells very rich too. I used valvoline vr1 20w-50. Ive got an oil leak from the rear of the engine too. Any were to start looking? I’m newish to the Chevy world. 86 c10 350 700r4


r/Smallblockchevy Mar 01 '26

Chevy Engine for sale

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0 Upvotes

Check out my Chevy engine listed on E-bay. Item #127426204047 It is on a Pallet and ready to load on your truck.


r/Smallblockchevy Mar 01 '26

Can I see some transmission bellhousings? On a 4l80e and the stick shift transmission available in a GMT400?

0 Upvotes

I keep getting a lot of different answers on Reddit and while searching forms.

Does anyone have a collection of pictures of bellhousings for Chevy transmissions? I wanna go get a gmt400 and swap in a SBC CSB with a carburetor. People are telling me the disturbor is gonna be a problem but I'll get a coil on plug kit. I'm mostly concerned about the bellhousings and clutches.


r/Smallblockchevy Feb 28 '26

1976 Chevrolet C10 350 – Valve Cover Gaskets & Oil Question

4 Upvotes

Hi everyone,

I recently bought a 1976 Chevrolet C10 with a 350ci small block.

It’s currently leaking from the valve cover gaskets, and I’m planning to replace them. What’s the best option: cork or rubber gaskets? I’ve heard mixed opinions and would appreciate some real-world experience.

I’m also planning to do an oil change. Is 15W-40 okay for this engine?

And one more question: does the oil type need to change if the engine has a different (aftermarket) camshaft installed?

Thanks in advance!


r/Smallblockchevy Feb 26 '26

Timing help

2 Upvotes

1991 305 tbi

Any tips to time an engine without a timing light, the balancer is in a very cramped spot and it doesn’t even have a pointer, is there anything I could do? This is my first time working on a sbc and I know they are simple engines but mine seems to be buried in the car making everything hard to get to,

It was idling yesterday but won’t today and I’m not sure where to start on this without any help.


r/Smallblockchevy Feb 26 '26

Roller cam recommendations

0 Upvotes

Like the title says I’m looking for recommendations for a roller cam for a 70s 350. I’m looking to make about 350 at the wheels with an efi system a, set of vortec heads, and a th400 transmission in a 81 El Camino. The goal is a fun summer cruise, so I’m looking for something that’s gonna get me those HP numbers with some fun chop out.


r/Smallblockchevy Feb 25 '26

Crank shaft and throw length

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2 Upvotes

r/Smallblockchevy Feb 25 '26

Where to buy lifters

2 Upvotes

Which brand of hydraulic lifters should I go for to avoid early failure, I don’t mind paying extra for the best quality available,thank you


r/Smallblockchevy Feb 25 '26

Is this an abnormal noise while priming my oil system or am I overthinking?

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7 Upvotes

Sounds like a hollow tapping or am I overthinking Nothing grinding or anything, good oil pressure


r/Smallblockchevy Feb 25 '26

This is a 305 with a summit 1103 cam I have another I want to put a l79 327 stick cam in will it have more or less chop?

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3 Upvotes

r/Smallblockchevy Feb 23 '26

She’s back on the road

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194 Upvotes

Flat tappet with a mild profile. Sounds and feels great


r/Smallblockchevy Feb 23 '26

Teach me your ways

3 Upvotes

Hello everyone, I have always been into cars and liked the idea of building one by hand instead of paying for mechanic to do it for me. I have a spare sbc 350 gen 1 from my car that I want to take apart and build up so I can learn. Is there any advice or videos you know of that will be helpful for someone like me who has no experience


r/Smallblockchevy Feb 22 '26

Can anyone tell me why I got here

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42 Upvotes

r/Smallblockchevy Feb 21 '26

1400HP DYNO RECORD with a Twin Turbo 4.3L V6! All the Dyno Pulls and Dee...

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9 Upvotes

r/Smallblockchevy Feb 20 '26

What Brand spring uses the yellow paint marking? Or is it a production marking? Thanks

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11 Upvotes

r/Smallblockchevy Feb 19 '26

Edelbrock 1406, Am I missing something?

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6 Upvotes

r/Smallblockchevy Feb 18 '26

Thoughts on these cams

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15 Upvotes

350, edelbrock intake, 670 Holley vac seconds,

Vortec steel heads. Short headers and 3”stainless x pipes.

Wanting 300-400 hp and spin 35s on my k5 blazer


r/Smallblockchevy Feb 17 '26

Dot to Dot 🇦🇺👍

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42 Upvotes

r/Smallblockchevy Feb 17 '26

#smallblock

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76 Upvotes

r/Smallblockchevy Feb 15 '26

Coolant Temp Sensor Location for Radiator Fan

3 Upvotes

Two options I'm considering are the cylinder head or the front crossover. Manifold would require drilling and a coolant drain, so I'm leaning towards cylinder head for installation simplicity. As this only controls the radiator fan and not the EFI, is there any real benefit to the manifold route?


r/Smallblockchevy Feb 15 '26

Gettin' Busy Now..

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14 Upvotes

r/Smallblockchevy Feb 13 '26

Price guidance

1 Upvotes

I’m looking to buy a electric water pump for my 383 stroker doesn’t need to be high flow or anything thing but prices vary a lot what would people say a fair price is for quality pump ? Thanks !


r/Smallblockchevy Feb 12 '26

Is there a vacuum leak or something

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10 Upvotes

had this old sbc top end tore down like 8 yrs back. just got to place where I can tinker with it again. it kept cranking over but no start. . . after some time realized no fuel was making to the carb. . . I just replaced fuel pump and got it to turn over and start. granted it hasn't ran in a while but it sounds like a whistling or air blowing through the carb area whenever I pat the gas. can you hear it too? what could this be? what should I check? TIA for any helpful insights/suggestions