Stock spindles, you might be right. I bought "early a" drum brake spindles, for using the Willwood brake conversion, too scary for me! The Wilwoods are 2" taller and forged 4130 material,(3x on strength). "replicaracer43", how much positve caster did you get with stock uca's ? Chassis rake was ? Full Akerman doesn't allow for tire slip angles,(difference of wheel steering angle vs tread angle on pavement/dynamic turning). "Full" means the steeering arm angles, as veiwd from overhead, would meet at centerline between rear track . 20% anti Akerman would mean their angles would be spread outward 20% of rear track width, from centerline. Correct amount of Akerman, can assist on "turn-in", going into a turn,(innner wheel toes out). Having too much scrub radius,+/-, will tend to magnify the effects of Akerman, and can push the tire past it's effective slip angle potential too soon.Cheers, ateam.