That is the Vortec 4.6L motor by GM. Good motor, built off of the 5.7L technology.
Vortec is the motors name in the blazer and it is a great motor
A vortec has bolts in the center of valve covers, instead of around the bottom edge
its "not supposed to be if it only jumped one tooth",, Good luck.
No it is not.
the vortec block and heads were introduced in late 1995 but actual vortec motor started coming in vehicles in 1996
NO. That would be the TBI / throttle body injection engine Not a vortec. The vortec will not work in the 91.
Dexcool
V8 6.0 liter Vortec
Yes they are the same.
A 1995 Chevrolet Tahoe has a 5.7L 350 TBI V8 for a engine, not a vortec.
A vortec 350 has a two piece intake manifold, with the upper portion being plastic.