Bell Never Aligned

My fit up on this build has expanded to actually driving the car a bit before final tear down. Actually driving the car before tear down wasn't always the plan so when I took on the 8 Barrel Hood idea, the 340 went in the car along with the A833 for support reasons only. I used my factory bell housing off the old 318 and, in complete ignorance of BH alignment, relied on the dowels and away I went. Then I decided to run the new motor so trans came back, in went the flywheel. No clutch, no pilot bushing. Now FF to today, clutch on the way, correct .915 bushing on the way. After reading many posts here I feel I have 0 chance of the tranny fitting up with a clutch and bushing because I didn't align the BH. What percentage would you give me?