1997 vortec 350

[jeff1953]

I've been having a brain fart, ok, was putting together a 97 350 and I was not thinking when I ordered parts and got the kit for a mid 80's 350 and my block is a 97 350, I have a cam question, ordered a flat lifter hydraulic cam will it work in the roller cam block, if not what do I need.

 

[L31MaxExpress]

I've been having a brain fart, ok, was putting together a 97 350 and I was not thinking when I ordered parts and got the kit for a mid 80's 350 and my block is a 97 350, I have a cam question, ordered a flat lifter hydraulic cam will it work in the roller cam block, if not what do I need.

Pushrods, Lifters, Timing set and it will work. Did a Lunati HE 268 flat tappet cam in the L30 305 spare parts motor I built for an Astro van that ended up in my Tahoe. Break it in properly with a good Zinc additive and it should do just fine. Actually worked pretty well getting 218/218 @ .050 duration in the Vortec engine and worked with the stock springs.

 

[jeff1953]

I was just wondering because the lifters sunk down inside the lifter whole.

 

[L31MaxExpress]

I was just wondering because the lifters sunk down inside the lifter whole.

Completely normal for flat tappet lifters in a roller block.

 

[Schurkey]

Makes no sense to install a flat-tappet cam in a block that can accept an OEM-style hydraulic roller cam.

Pistons for the older application will have wide ring grooves, and there's no telling what they have for compression distance. They could wind up .040 in the hole, or more. Again, not a recommended plan.

Send the kit back. Get the more-modern parts. BE CAREFUL with piston compression distance--the aftermarket loves to fudge that, and then you have no quench, and less compression ratio than you expect.

 

[jeff1953]

Thank you all for your Info. I already had all the new parts when I noticed the older block I was needed bored out so I thought I would try putting one together like that, or even a budget build I suppose, when I get it in and running I will let you all know how it turns out and thanks again for your help.

 

[PlayingWithTBI]

Follow your cam manufacturer's break-in instructions and use this stuff with something like Valvoline 5w-30 conventional oil.

https://www.summitracing.com/parts/isk-zddp/overview/