Clutch fork for 621 bellhousing?
11-25-2018, 03:09 PM
#1
Launching!
Thread Starter
Clutch fork for 621 bellhousing? Setup is a ‘88 Corvette with a 5.3 ls swapped in. Planning on using the factory DN 4+3 tranny(T10). I already have the Sachs 1050 flywheel and a clutch bought for a 2nd gen camaro.
Last part I’ve been trying to figure out is the tob.
After some readying I see Novak makes a piece that allows the use of a clutch fork to mount onto the 621 bh.
https://www.novak-adapt.com/catalog/...hcr3/kit-hcrc/
How do I know if I need the 7/8 or 3/8 setup and can I use my factory clutch master? Also not sure which clutch fork And tob I’ll need.
Last part I’ve been trying to figure out is the tob.
After some readying I see Novak makes a piece that allows the use of a clutch fork to mount onto the 621 bh.
https://www.novak-adapt.com/catalog/...hcr3/kit-hcrc/
How do I know if I need the 7/8 or 3/8 setup and can I use my factory clutch master? Also not sure which clutch fork And tob I’ll need.
11-29-2018, 10:54 PM
#2
A 621 is a 168 tooth flywheel compatible bell from the 2nd gen F-body, and 6?-7?Chevelle era. The repop ones made now commonly include bolt 7 up top for the Gen III-IV.
For a C4, a Lakewood 15020 may be a better fit. It has an angled fork, using the 84-92 F-body fork. The C4 also had an angled fork, for clearance, as did other GM platforms that era. But its' bell is for a 153 tooth flywheel. But, it has a slave cylinder mount already.
Floor / exhaust clearance and cost are the variables for which one to go with.
A fork for it for a 621 application (see apps. on
4speedconversions) is all that's needed if you go 621.
For a C4, a Lakewood 15020 may be a better fit. It has an angled fork, using the 84-92 F-body fork. The C4 also had an angled fork, for clearance, as did other GM platforms that era. But its' bell is for a 153 tooth flywheel. But, it has a slave cylinder mount already.
Floor / exhaust clearance and cost are the variables for which one to go with.
A fork for it for a 621 application (see apps. on
4speedconversions) is all that's needed if you go 621.
Last edited by jmd; 11-30-2018 at 12:25 AM.
11-29-2018, 11:04 PM
#3
Launching!
Thread Starter
A 621 is a 168 tooth flywheel compatible bell from the 2nd gen F-body, and 6?-7?Chevelle era. The repop ones made now commonly include bolt 7 up top for the Gen III-IV.
For a C4, a Lakewood 15020 may be a better fit. It has an angled fork, using the 84-92 F-body fork. The C4 also had an angled fork, for clearance, as did other GM platforms that era. But its' bell is for a 153 tooth flywheel. But, it has a slave cylinder mount already.
Floor / exhaust clearance and cost are the variables for which one to go with.
A fork for it for a 621 application (see apps. on
4speedconversions) is all that's needed.
For a C4, a Lakewood 15020 may be a better fit. It has an angled fork, using the 84-92 F-body fork. The C4 also had an angled fork, for clearance, as did other GM platforms that era. But its' bell is for a 153 tooth flywheel. But, it has a slave cylinder mount already.
Floor / exhaust clearance and cost are the variables for which one to go with.
A fork for it for a 621 application (see apps. on
4speedconversions) is all that's needed.
Well I already have the bellhousing and I’ve had it installed in the car. I came acros Novak and their bracket for the 621 bellhousing to mount their external slave. Just got an email saying it’s on backorder until January though. Their kit comes with the tob, bracket and slave so hopefully it all works well in the car.