B16a1 or b16a5 in my 90 teg GS?

[system]

Of all these engines, which ones would fit into my 90 teg GS easiest, and cheapest.

also which wngine do you think is the best value for the money, and why? :shrug:

http://www.twistedperformance.com/engines1.html

[caliquick_teg]

90-91 b16a