I have a 95 4.3L vin "W" and was looking to rebuild. Since Im doing a rebuild, I thought a cam kit might not be a bad idea. I dont really want to have to mess with anything else such as the computor but want to get as much bang for my buck as possible.
Any ideas???

 

Use a GM replacement cam and GM rollerlifters to make power up to 5000 RPM.Low end torque will be hurt very little.
Camshaft: GM-10051147 (hyd. roller )
Spec.: 222 deg. @ .050" lifter rise, .447" valve lift, 114 deg. LCA
Valve springs: GM-10134358( 1.273" O.D. - need 12 )
Spec.:Seat pressure: 110 lb. @ 1.700", coil bind: 1.160", open pressure at .447" valve lift: 269 lb.
Retainers: GM-14003974 ( need 12 )
Pushrods: GM-10134309 (hardened for guide plates -.075" wall, need 12)
Save some money and clean and reuse your old lifters.
You shouldmachine the stud boss and tap the heads for3/8"-24 screw-in rocker studs to use withthat cam and valve springs.
Rocker stud: GM-12495497 ( 3/8"-24 adjustment threads - 7/16"-14 lower threads )
Guide plates: GM-14011051 ( need 4 - use on cyl. 1, 2, 5, and 6 )
Distributor gear: GM-10456413 ( .491" dia. dist. shaft )
Just forcomparison a regular production cam has .351" (I) and .386" (E) valve lift and is a torquing cam andwill lay downabout4000 RPM.

After market cam grinders have not spent much time developing high performance and racing camshaftsfor the 4.3L V6 engine for obvious reasons.

TheGM camI suggest will preserve what little torque the 4.3L V6 has and it needs all it can get, especiallyin aheavy vehicle like a Blazer. With that cam, you can use your old GM roller lifters. Youwill not have to add headers or change to a 3.73 or 4.10rear end gear ratio in order to get backlost torque byfinal drive multiplication. Your little GOV-LOC locking differential cannot tolerate much more horsepower that astock 4.3L V6 engine can develop. A 10-bolt GOV-LOC (G80) locking differential is good up to 280 - 300 HP and any more couldbreak it.