[FC] Just a few questions

[James Davis]

I agree with Ken.  Using the 64 car engine mount bracket or a 61/63 bracket 
for an AC car is required for the mount to clear the harmonic 
balancer.  This moves the slot for the rear motor mount back by 1.5 inches; 
necessitating cutting and re-welding the motor mount hanger which is welded 
to the FC's rear frame (engine box).  Failure to do this will move the 
engine forward and this will throw the rear toe off.  It will also stress 
the front transaxle mounts causing them to separate.  Most people use the 
61/63 crank pulley and the standard engine mount adapter, but as Ken states 
you run the risk of breaking the crank.

  I can't imagine why increasing the displacement by 5.2 cuin would effect 
the engine cooling.  FC's typically have an oil temperature problem not a 
cylinder head temperature problem.

OK about transmission/differentials.  The only differential difference in 
comparing a 61/63 and a 64 (for a 3/4-sp) is the two tapped holes in the 
bottom for the leaf spring and the provision for a dipstick.  There are two 
distinctly different 1964 4-sps.  The 64 FC transmission retains the 3.60 
first gear of the 61/63 car transmissions but uses the 14 spline input 
shaft of the 64/64 car transmissions. The 64 car transmission has the same 
14 spline input shaft but has a 3.20 first gear which is a distinct 
disadvantage in a heavy FC.  All 61/63 4-sp have a 12 spline input 
shaft  All have the 3.60 first gear except for a few 61 Rampsides which 
came with the 4.26 first gear (the perfect FC transmission). The 65/65 
transmission has a slightly stronger input shaft and gears.  Also note the 
front transaxle cross member is different in cars and FC's thus a 64 
transmission of any sort requires a FC manual crossmember.  Late 63 through 
FC use a different cross member than the 61/early 63's, relocating the 
clutch cable higher.
Jim Davis


At 09:32 AM 1/23/2005, you wrote:
>Hello,
>
>I'm getting ready to do a few changes to the drivetrain of my rampside and 
>have recently read and spoken to some folks that have prompted additional 
>questions.
>
>I was going to install an automatic with a stall torque converter and a 
>110hp with 060 pistons, otto cam and other mods.  I heard, with the 060 
>pistons I WILL run into cooling problems?  Anyone else have troubles of 
>this nature in an FC.
>
>Will I need to make any changes to the motor mount when putting in a 
>110hp, perhaps use the 110 motor mount and drill and thread additional 
>mounting holes or ?
>
>If I decide to keep the manual tranny and install the 110hp will the same 
>input shaft work or will I need another donor shaft.
>
>Any differences in the tranny and rearend of a 61 and a 64 FC (64 being 
>better)?
>
>thanks in advance