98 injectors in 88

What problems if any would I expect to have if I run 98 injectors in my 88? I know that 87-95 runs about 39 psi fuel pressure and 96+ runs 49 PSI (correct me if I am wrong). Would the ECM just correct for this by increasing injector pulse width or would I stil have issues with running lean? I know that HESCO makes an adjustable fuel pressure regulator, but I can't see myself paying that much for it. http://www.hescosc.com/shop.asp?action=details&inventoryID=43021&catId=7973
Thanks for any input
88 XJ 4.0L AW4 NP242 D30 D35, 98 Longblock Homebrew BB w/30's

Those 98 23.2#@49psi injectors will flow 20.7#@39psi. 18.6# is stock for the renix. I'm not sure if the renix controller will cut injector duty cycle to maintain 14.7AFR, as I didn't start tweaking XJs until well after my 88 bit the dust. I will say if you have a less restrictive intake and a bored out TB that you should be less worried about it running rich and that you'd see a nice increase if installed at the same time as the injectors.

We put 98 injectors from a broken motor on my sons 87,It smells a little rich,but runs and drives OK.The injectors have been in there over 2 years .
I really cant comment on the gas mileage.

Wayne

because the hesco regulator is so expensive, i did a quick search and found this. i dont know if it is vacuum assisted like the stock regulator. the fuel connections would need to be modified also

http://www.atlanticspeed.com/productcart/pc/viewPrd.asp?idproduct=2733&idcategory=0

same one different site. looks like the end of the adjustment screw is for the vacuum line.

http://spideraccessories.stores.yahoo.net/fuelregulator.html

modify the stock one

http://www.go-fast.org/z28/afpr.html

35-60 psi around 110$

http://www.jegs.com/i/Holley/510/512-503-5/10002/-1