if i build a BUDGET 360.... LA Vs Magnum 5.9

Sebambam said
1st approach is to get running what i have ( 318)

Yes, do that. Then you have some options.

If the 318 is in good health, you could upgrade that in the car and save some cash.
You could build a hotrod 360 on the side and enjoy a running car with a 318 until you have everything necessary for the swap.
If the 318 is toast, well the answer is half obvious, do whatever is more cost-effective... or not.
Order a pizza pie with pineapple toppings.