There is one slot or groove on the harmonic balancer which runs across the edge, and facing the engine, with the upper fan cowling removed, there is an alighnement mark on the front right side of the engine at about the two o'clock position.
no
255hp
350 i think.
That would be a 700R4
Yes it will fit right in there with no problems.
YES, That is a direct swop.
200 hp
255 rwhp
Try a search for vortec engines
In order to set the timing on a 98 Chevy 350 vortex, you have to time with a scan tool that will let you set timing. Or let garage do it
Need make, model, year and engine. example: 1990 GMC K1500 w/350 engine.
They are basically the same heads, If the 93 350 is a vortex motor.