1994 S-10 blazer transmission question?

hello;

i have a 1994 Blazer with the 4.3 vortec and i'm assuming 4L60E since the trans has no tv cable.

anyway i changed out the fuel injection for carburetion. the 'puter is still hooked up. now the trans won't engage until around 1,200 rpm and when it engages it does so faster in 1st than in drive, the transfer case shifter which is a switch on the dash doesn't light up or engage at all...reverse however works fine.

i contacted tci yesterday and they are telling me i need $1,100 worth of electronics to make this work, including their programmable computer, harness and throttle position sensor.

now, spending another $1,100 on a vehicle thats barely worth $1,100 anyway seems harsh, has anyone else done this type of swap and can give me a cheaper idea...

i was wondering about changing the trans to a 700R4 which is not elec, but then i ask will i need to change the transfer case also to get it to work since its also elec?

any realistic thoughts would be great.

Thank You.