8ba flywheel and clutch question

[cas3]

i bought a running 8ba from a guy and he gave me some extra stuff too. i got both the car and truck bells, and two flywheels, and a 10" and 11" clutch. i'm using the car bell, and lighter flywheel, but the pp bolt pattern is wrong. i have here 9", 10", and 11" pp's, and none fit. cant find a part # on the flywheel, my books only go to 48, but i see speedway catalog shows a 10 1/2" long style plate and disc. really? 8ba's had that?