i still think you better stick with the l28ET since it can make 300 to 400 HP if you want that, and is plug and play as where w a lot higher maintance vgdet engine does not, it makes around 200 HP in stock form on the us market and 229 on the european market.
there is in my opinion no advantage as being a better power platform between a vg ar a L engine, at least not big enough to go through all the hassle, when you would swap 300ZXTT ok. or RB but atherwhise why create $$ problems
If you really want to have a good ( ok this is disputable guys) swap, swap to l28ET with a 83 T5 trans r200 (LSD )out of a 86t ( in europe they have LSD in 86 dont know how it is in the states any input?)
get some good utherane bushings and shocks an IC, raise the boost to 15 orso and have fun that will get you close to 200 on the wheels.
when you or your dad for that matter gets bored with it, get some bigger injectors a megasquirt system, a t03/04 turbo, and the sky is the limit (300> HP) even 500 to 600 is possible ( JEFFP) all on a l28et
why go hassle for same power you can get plug and play?
let us know