I’m putting a TKO600 in mine as well and originally thought to fabricate mechanical linkage, but after seeing the amount of room for exhaust, starter, steering shaft, and clutch, I’m leaning towards hydraulic too.
__________________
Hoping to finish a project while I'm still able to push the clutch in.... 
1963 Tempest Convertible (195-1bbl, 3-speed transaxle. 428 RAIV, 5-speed, IRS planned) Pictures
|