Roller cam & rockers?

First of all your torque hopes are a bit high because of displacement and best towing perfromance usually means best possible lower to mid RPM power/torque which does not play well with higher HP ratings that need higher RPM torque peaks and curves to achieve them. Also vehcle compression ratio, tranny type, tire size and axle ratio plays a big roll in the best cam timing for desired useage as there is no universal "works in all senerios" and anyone that tells you that it does is blowing smoke. If your are seriuos about it being a good tower, limit duration to about 260 degres (maybe 268 if your gearing is proper) and plan on runniong at least 89 octane if you want to tap its true potenail unless you aew running about 8.5 to one or less CR because 87 will knock and one way or the other the spark curve will have to be retarded and this will limit performance and MPG. It will hurt you the worst towing too.

----------------- TheSnoMan.com

Your best bet is to call the experts. Crower, Crane, etc... all have help lines you can call. Call them and ask, because there are a lot of things to take into consideration. A cam can make compression or take it away all with the valve timing. As long as you stay with a low end cam you can make torque, look at what most big gas trucks use for an engine a 366 Big Block... a torque monster engine. Please post what you go with and what you got out of it when you are done... curious to see if you get close to your expectations.

P.S. it can be done... Jegs offers a ready to run 383 with 395 HP and 440 TQ.

Snip

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Roller cams and rockers dont need any ajustment so long as you use hyd. lifters. I used CompCams roller lifters, cam, and Magnum roller rockers in my 5.7 89 chevy. (Be aware that the push rod length will need to be shorter with some set ups. Your brand of choice (Comp, Crane, Crower, etc) should be able to tell you that). Chevy has two types of cam thrust plates for the roller set up. For some odd reason, the V6 uses a smaller one then the V8, but sometimes the V8 blocks have the V6 version (Go figure). If the plate you get is too wide for the holes, you need the V6 version. You might need bigger valve covers for the roller rockers (CompCam magnums are smaller than those 'block' type roller rockers, but you may still need to cut out supports for the stock center bolt covers).

Roller set ups are so much better than flat tappet cams. I highly recomend it.

As far as the type of cam you need, that all depends on the tranny, tire size, rear axl ratio. When you make up your mind as to who your going to use, call them and let them know that stuff, and they will hook you up with a sweet cam.

HDS