The time if finally here to do my rebuild, I really wanted to do a stroker but I have heard a lot of mixed reviews about reliability, and this is my primary vehicle to work. I have researched a lot online at different grinds on cams and most of them say not for EFI, so I am hoping some of you guys have done this. I know I am not going to see a huge difference over a stock cam, but it wont cost that much more to put a after market one in. And I should gain some hp and torque. If any of you have went with a larger cam shaft any feed back would be great. My build consist of 30 over pistons and and all the internals from engine tech bearings gaskets ect. stock crank a diy port and polish on a 0630 head, 62mm throttle body and a new header. I was already running 2 1/2 inch exhaust with a flowmaster super 40, and some 4 hole injectors.

 

I'm currently gathering parts for a 4.7L build myself. There seems to be 2 Cams that are working well. Comp Cams 68-200-4 & 68-232-4. 68-200-4 is the typical RV Cam for 4L's. It offers a little more lift & duration and is likely to be compatible with stock Springs & Push Rods. 68-232-4 has significantly more lift and will need firmer springs and shorter push rods. Stock push rods are typically 9.639" to 9.641". You'll have to measure anyway but I have noted that the 68-232-4 Cam will require 9.621" Push Rods, Sealed Power Part # RP3200. Both cams work just fine with EFI & Coil on Plug Ignition. You'll probably want to call Russ at Bishop-Buehl Racing Engines (626) 967-1000 and see what he recommends. Also call Comp Cams directly. These Cams are bolted in using the older style Bolt & Spring loaded Pin rather than the retaining plate.

 

Do you have the part# for the springs that are needed for the 68-232-4 cam? I have looked online and not getting very far, you can find the springs but they say the valve stem diameter is different for the newer enginges.

 

There is tons of confusion from online retailers on compatibility. Comp Cams 926-12 are the springs that have been recommended to me for the 232 Cam. I'm pretty sure the Valve Stem diameter is the same from 06' back to 87'.

 

I am pretty sure I tried those springs before and they didnt work. Beehive springs work best. I like using the GM LS6 valve springs but they require you to do a bit of machine work to the head where the springs sits. They are just a little bit wider then the factory spring pocket. Any halfway decent machine shop can take care of that for you though.

 

The spring seats will likely have to be machined for any performance spring. We also need corresponding Retainers. For the Comp Springs 926-12 you need Comp Retainers 744-12. Mopar also has a spring that works with the 232 Cam. P5249464, with Retainers P4452032. The Mopar springs are a little less bulky than the Comp Springs. Stock Spring OD, 1.338". Comp Spring OD, 1.475". Mopar Spring OD, 1.418".

https://www.moparmagazine.com/2015/1...-valve-spring/