I'm trying to do a heads and cam swap as cheaply as I possibly can. May be getting some L98 heads locally and I want to use this cam. Do I just need good springs, or what? What kind of power should this combo make with all proper supporting mods and custom tuning? (see sig)

http://store.summitracing.com/partde...8&autoview=sku

 

you will see an improvement over you cam just a little bit though... i thought the L05s cam with LT1 cams but what ever that cam wont take much in terms of work to the heads MAYBE springs but that cam isnt far from stock and MAYBE a little clearance work on the head but you could probably do it all your self...

 

You're going to need to machine the guides down a bit- the lift is over the somewhat safe .470" max those heads can take in stock form.

Have them machined down, install the matching Comp 981 springs (drop-in replacements for stock- no other machining required) and put it all back together with the stock locks and retainers. Yes, even the crappy exhaust-side rotator-retainers.

If you want to go the extra mile to get rid of the exhaust side rotator-retainers and replace them with "standard" retainers like the intakes use (not really necessary for sub-5500 RPM use, in my opinion) you can do that as well, but you will also need to put a .060" shim in the exhaust spring pocket to bring the installed height back up to factory spec.

DON'T go so cheap that you talk yourself into using stock springs- you'll be giving up quite a bit of upper-RPM fun if you do. Put the 981s in.

 

L05 did not come with an LT1 cam. I'm pretty sure it's more like the L03 cam. A small chance it's an L98 cam which is still MUCH smaller than the cam I posted.

 

you are right it didnt come with the LT1 cam... but there are 2 versions of the L05 the truck and the caprice both with different cams and the same heads...
CAM 88-89 L98 10066049 In/Exh Dur@.050" 207'/213' Lift (w/1.5) .415"/.430" LobSep 117'

Cam Style:Hydraulic roller tappetBasic Operating RPM Range:1,200-5,200Intake Duration at 050 inch Lift:212Exhaust Duration at 050 inch Lift:218Duration at 050 inch Lift:212 int./218 exh.Advertised Intake Duration:264Advertised Exhaust Duration:269Advertised Duration:264 int./269 exh.Intake Valve Lift with Factory Rocker Arm Ratio:0.488 in.Exhaust Valve Lift with Factory Rocker Arm Ratio:0.495 in.Valve Lift with Factory Rocker Arm Ratio:0.488 int./0.495 exh. liftLobe Separation (degrees):112Intake Valve Lash:0.000 in.Exhaust Valve Lash:0.000 in.Computer Controlled Compatible:NoGrind Number:CS XR264HR-12


not really that much smaller

 

Manley 22410-16 springs and 23652-16 retainers will drop right in and give you .550" max lift. Change the stock valve stem seals while you're in there, and you should also get the Manley 42106-16 3/8" screw-in rocker studs. Now you see why we suggest aftermarket heads, as it costs so much to upgrade stock heads and they still suck.

 

Once I figured out what needed to be done I was going to price it out then compare to aftermarket....

Just a rough estimate including all the machine work I should plan about $750 including the price of the used heads to have quality L98 heads running on my motor. Sure does make aftermarket look better.