eshorvath
1/2 ton status
Im debating putting in a BBC, replacing my SBC...Any suggestions? Where can i get the bell housing to adapt, for my 4 speed manual? Anyone done it?
Eddie
Eddie
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.
Big Block Swap
- Thread starter eshorvath
- Start date
ben427
1/2 ton status
1. Take out smallblock
2. Take motor mounts off smallblock and put on big block
3. Drop bigblock in
4. Drop in larger rad.
Thats about all there is too it, keep an eye on distributor clearance at the firewall. The bellhousing pattern is the same as any 1960's up chev smallblock.
2. Take motor mounts off smallblock and put on big block
3. Drop bigblock in
4. Drop in larger rad.
Thats about all there is too it, keep an eye on distributor clearance at the firewall. The bellhousing pattern is the same as any 1960's up chev smallblock.
k20
3/4 ton status
also if your going to run roller rockers youll need tall valve covers, which will require a body lift or some firewall massaging. I had a 2" body lift and had to do a bit of grinding to the plate the brake booster attaches to the firewall on. Other post is about correct in whats needed.
stretch67
1/2 ton status
you need a big block flywheel. maybe big block mount otherwise everything else is the same. thats why you bought a chevy instead of a furd right? /forums/images/graemlins/woot.gif
bajaviking
1/2 ton status
As somebody else said you will need the bigblock flywheel, I think the pre 91 bigblock flywheels are different form the newer ones so you need to know what year big block you are getting before ordering the flywheel. I did not change my radiator and have not had any overheating problems. I am running a stock 454 with headers and dual exhaust and I am very happy with how it performs. Reliable and strong /forums/images/graemlins/waytogo.gif
supersize75k5
OrganDonorRacing.com
there was just recently a thread on finding a flywheel when doing the sm465 and big block.
I curently am swapping out my small block crate from the 86 and throwing the big block from the 75 in it. I just love that throttle /forums/images/graemlins/peace.gif
Plus it gives you a great reason to get new tires every year /forums/images/graemlins/whistling.gif
-shawn
Kepp in touch and we can share info as we are both doing the sm465 and big block /forums/images/graemlins/thumb.gif
I curently am swapping out my small block crate from the 86 and throwing the big block from the 75 in it. I just love that throttle /forums/images/graemlins/peace.gif
Plus it gives you a great reason to get new tires every year /forums/images/graemlins/whistling.gif
-shawn
Kepp in touch and we can share info as we are both doing the sm465 and big block /forums/images/graemlins/thumb.gif
eshorvath
1/2 ton status
How is your swap going?
Eddie
Eddie
supersize75k5
OrganDonorRacing.com
I have decided to put the big block in the 72 project now, the 86 will keep it's motor and the buggy will get the zz4 crate 350,
the 72 will get a t-400 if I can find one, if not it will get my sm465 2wd. /forums/images/graemlins/thumb.gif
the 72 will get a t-400 if I can find one, if not it will get my sm465 2wd. /forums/images/graemlins/thumb.gif
eshorvath
1/2 ton status
How did your SBC/BBC swap go?
Eddie
Eddie
You only need a different flywheel if you are using a 454.
spincast375
1/2 ton status
This is the best thread I have seen in our first year with CK5. I have been asking for a separate forum just bbc 454's. No success, yet.
PO installed our 454 in our dd. The trans is a TH350. What are you guys running? We'd like the 700R for its overdrive. But we have read there are reliablility issues. If we had a good trans shop that could change out the drive shafts, we'd look more seriously at it.
How can I tell if the PO installed a different flywheel?
Thanks. Again.
PO installed our 454 in our dd. The trans is a TH350. What are you guys running? We'd like the 700R for its overdrive. But we have read there are reliablility issues. If we had a good trans shop that could change out the drive shafts, we'd look more seriously at it.
How can I tell if the PO installed a different flywheel?
Thanks. Again.
spincast375 said:
If you're driving the truck, the flywheel was swapped. A 350 flywheel doesn't work on a 454.
I'm pretty sure that a 454 is externally balanced, and a small block (excluding the 400) are all internally balanced. This is why you would need the flywheel for the 454.
I know you said you're running amanual trans, but this may be helpful for someone else. Appearantly there is a different bolt pattern for the torque converter on a small block than there is a big block. I have a TH350 that had a small block in front of it. I dropped the 454 in, bolted up the motor mounts and bellhousing then realized that my torque converter bolts didn't line up.
Luckily I had a th400 torque converter that was from a big block. Some converters have both patterns, but not mine.
I know you said you're running amanual trans, but this may be helpful for someone else. Appearantly there is a different bolt pattern for the torque converter on a small block than there is a big block. I have a TH350 that had a small block in front of it. I dropped the 454 in, bolted up the motor mounts and bellhousing then realized that my torque converter bolts didn't line up.
Luckily I had a th400 torque converter that was from a big block. Some converters have both patterns, but not mine.Some flex plates also have holes for both torque converter patterns.
