Here's maybe a solution? I found a turbo that's a T4/GT35 turbo and it has the compressor inlet 1" smaller than the all T4 turbo but it has the same A/Rs (.68 Tur, .70 Comp). Would that help enough to negate the undesirable A/Rs?

http://cgi.ebay.com/ebaymotors/GODSPEED-...#ht_3573wt_1042


69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.