L98 aluminum heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dave666693 · 07-23-2017, 07:48 PM

Got a good deal on a set of these # 10088113. Did lots of reading and I now realize they need porting to be high performance but some guys are saying pretty good torque as is. I want to throw them on a stock 350 in my work truck. Just to run to the dump and haul dirt. Anyone see that being a problem. I know it might be a waste but I got the cheap. I was going to put them on a 400 HP 350 I am building but don't want to mess with them if they need all that work to use. Any thoughts? Thanks guys

**Captainfab** · 07-23-2017, 11:30 PM

Those are 25 year old tech but GM used them on the ZZZ, ZZ1, ZZ2 ZZ3 and ZZ4 crate engines producing 345hp. So long as you are not expecting big power numbers, I would go ahead and use them. Just be aware that they do have angled spark plugs which may cause exhaust manifold or header clearance issues.

Tom · 07-25-2017, 04:27 PM

They are not high performance anymore but they are better then stockers. Make sure the combustion chamber volume won't put you out of pump gas ability and that the spark plugs will fit then run em.

07-23-2017, 07:48 PM	#1
dave666693 Registered User Join Date: Jul 2005 Location: Edgewood, WA Posts: 899	L98 aluminum heads Got a good deal on a set of these # 10088113. Did lots of reading and I now realize they need porting to be high performance but some guys are saying pretty good torque as is. I want to throw them on a stock 350 in my work truck. Just to run to the dump and haul dirt. Anyone see that being a problem. I know it might be a waste but I got the cheap. I was going to put them on a 400 HP 350 I am building but don't want to mess with them if they need all that work to use. Any thoughts? Thanks guys __________________ 67 C20/ 68 C10 stepside/inline 250--current project 71 GMC 4x4 70 Blazer project-Zombie assault vehicle 67 4x4 Burb Last edited by dave666693; 07-23-2017 at 09:16 PM.

07-23-2017, 11:30 PM	#2
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,246	Re: L98 aluminum heads Those are 25 year old tech but GM used them on the ZZZ, ZZ1, ZZ2 ZZ3 and ZZ4 crate engines producing 345hp. So long as you are not expecting big power numbers, I would go ahead and use them. Just be aware that they do have angled spark plugs which may cause exhaust manifold or header clearance issues. __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

07-25-2017, 04:27 PM	#3
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,689	Re: L98 aluminum heads They are not high performance anymore but they are better then stockers. Make sure the combustion chamber volume won't put you out of pump gas ability and that the spark plugs will fit then run em. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

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