I've got a stock '80 B28F in my Volvo 262(K-Jet, Lambda/cat/freq valve, de-accelerating valves on throttle plates, ignition distributor with vacuum delay solenoid, stock F cams, stock F pistons, 004 warm up regulator, no micro switches, same full distributor as a stock Delorean). I also have my original B27F that has the smooth throttle plates. I've also got new B28E cams and pistons, and a B28E dizzy from a UK spec Volvo. Question: What is the best configuration I should go with to improve performance? My consideration: Use B27 throttle plates, de-Lambda the engine (O2 sensor, cat and freq valve), use the B28E dizzy and remove the vacuum delay solenoid components, B28E cams and pistons, advance timing from 10 to 13 and adjust CO from 1% to 1.5-2.0%. I'm also trying to hook up with a B28E fuel distributor and CPR. When I'm looking to locate the B28E fuel distributor do I need just the distributor or do I need the distributor and the air intake? Which CPR should I look for, 038 or 066? Remember, no micro switches. After replacing all the components, what is the best way to tune for best results without the Lambda system? I'm also considering doing some head porting. Does anyone have any pointers/tips on doing PRV heads? I know the exhaust really needs at least gasket matching and a good cleaning and polish. What about doing the intake? Any tips on how to match the intake manifold to the heads? I have a source to have headers made but I'm trying to get information on what the best specs for the headers will be: runner length, tube ID/OD and collector size. Thanks for any and all help! Rick To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/