258 Head on 4.0

[machinedog]

New to site I am replacing a Pimped out 258 with a stroker 4.7. Question is will a 258 head work on a 4.0 block so I can spend more on the short block and get a few more years out of my 2.02/1.94 head with clifford & elddy 4?

[SkylinesSuck]

Could be wrong, but I'm pretty sure even ported/polished with a big cam and over sized valves, a 258 head flows so poorly you'd still do better to use even a stock 4.0 head.

[Plechtan]

Maybe this should be posted in the FAQ section. This has been discussed several times, and the conclusion has always been that the 4.0 head was much better. I believe the 258 intake can be installed on a 4.0 HO head by drilling new holes for the locating pins. You should be able to get a head pretty cheap, I really dont see a bigh cost impact here.

I don't think anybody would argue that the EFI will give you better performane and better gas mileage than a carb. You can get a wiring harness for the Jeep EFI for about $450.00, then a ECU and other parts form a donor or junk yard.

So we are back to the age old question , where is the money better spent?

[streetpirate]

sell your worked head and manifolds to a die hard 4.2 guy and use the money for 4.0 parts

[machinedog]

I took your advice and found a 96 Ho head with spare block for future Scrambler build for $100. So its back to the bench & grinder's to clean up the new head for the 2.00 & 1.60! Good thing Iv had a lot of practices maybe it will be better this time