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well i'd be against it personally we have 2 grand cherokee's in the shop right now with 4.7's one has a craked head and the other has a spun main bearing so I dont see any good in them over the 5.2l

I would check all the vacuum lines and if you have power breaks check the anti-blowback valve I dont know if it will make that much of a differance but if you have changed the manifold and rebuilt the carb that is whare I would start. other then that it kinda sounds like a carb or timing/dist issue.

totaly agreed I hand them out all day long. they seem to be good quality, also I dont know if this matters but they are made by mobil dont know whitch line of mobil. the only thing I dont like is how they dont make a longer filter equivelent to the fram ph8a's but the 5281090 filters are still...

I love AMSOIL oil filters

yes the HEI will clean up your wiring + you get to throw the ballast away for good if the module goes up you can just pick anouther one up at a parts store really cheap and the mod will only cost you about $30 the only other thing you will need becides the module is a few butt connectors (or I...

the biggest problem with HEI is it will not hold good output at high rpms

I really like the factory distributor recurved, with the HEI upgrade really woke up my engine I like it better then the mopar upgaded modules

You might also want to check your local laws cuz I know in MD if you get pulled over and the bottle is hooked up they take your car never for you to see it again it then become government property. But you can have it if it is not hooked up (for track use only) also if you get caught racing with...

I personally like the HEI modification to get rid of the ballast and the old out dated ECU. You get much better spark, more power, better fuel econ. you get to gap your plugs around .60 and the GM module is only like $30 at any parts store.