Jeep Strokers

I am building a stroker with forged pistons, 4.0 rods and comp 68-235-4 cam. My machinist is waiting on me to get him some valves, retainers, spring, and locks. After studying this it appears I want ls1 valves retainers and locks. Not sure about springs. Anyone have any ssuggestions and part numbers. My machinist builds racing engines and works on his buddy's stuff after normal business hours. He likes the gm ls1 valves but wants me to bring him this stuff so he can finish the heads.

I use and recommend Manley LS Valves with a PSI valve spring and chrome Molly retainer and keeper package.

Feel free to shoot me an email and I’d be happy to forward you information and pricing

Thanks,
Russ Pottenger
Bishop-Buehl Racing Engines
531 N. Lyall Avenue
West Covina, California 91790
Work (626) 967-1000
Cell (626) 673-2203
Email/PayPal: [email protected]

5.7 hemi valves are larger, drop right in the guides and you can use stock springs, retainers and keepers because they are the same as the 4.0 valves. Tim

astjp2 wrote: ↑November 7th, 2018, 5:22 pm 5.7 hemi valves are larger, drop right in the guides and you can use stock springs, retainers and keepers because they are the same as the 4.0 valves. Tim

Huhh..., the things you learn.

Expensive mistake, If the edelbrock head would have been out, that would have been cheaper...

astjp2 wrote: ↑February 25th, 2019, 12:43 am Expensive mistake, If the edelbrock head would have been out, that would have been cheaper...

The Edelbrock cylinder head is a good upgrade but isn’t the cheapest option.

BTW, ... good opportunity to put out a selfless plug that I now have a Edelbrock specific custom piston in stock for my 4.6/4.7 Stroker Kits.
This maximizes the potential of the upgraded Edelbrock designed combustion chamber.

I was a little off on my statement above, I meant to say that for what it cost me to put in small block chevy valves into a 7120 head cost me more to get the springs, retainers and locks with the spring pockets machined than what I would have paid to get a edelbrock if they were available at the time. This was 12 year ago though when I built the engine.

The Edelbrock head was only released after the Jeep 4.0L engine went out of production which was much too late. It should instead have been released in the early 90s when the XJ, YJ, and ZJ were being sold by the bucket load.

I am actually thinking of building a stroker for my 05 LJ, I am just not sure what year block I need to find to make the swap easy. The last time I built a stroker, it was 12 years ago and technology sure has changed. I have 3 7120 heads but I dont think they will work with the coil packs. I am also not sure if I should go with the Edelbrock or if I stuck with a newer head...or if the 7120 would work. Decisions, decisions, decisions...

You could fabricate custom coil pack mounting brackets for the 7120 head so that isn't an issue. The problem is that your '05 exhaust manifold won't match up to it. That's where you'll need to decide whether to go for:

1. A ported 7120 or Edelbrock head with aftermarket dual outlet header (that allows you to reuse the factory precats).

2. Stick to an '02+ head, have it ported, and reuse the stock header.

No.2 seems like the least hassle.