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| | | | Joined: Feb 2011 Posts: 6 New Guy | | New Guy Joined: Feb 2011 Posts: 6 | i have a 48 2ton school bus with a 235 the block is cracked so i going to put a 350 in itand keep the sm420 my question is motor mounts. whats the best way to do this should i use the mid mounts on the motor and the bellhousing or should i use the front mounts and the bellhousing
| | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | You will need a V-8 flywheel and bellhousing. None of the 235 stuff can be used for the conversion. You can use the SM420 trans. Pick up a V-8 bellhousing from a 55-59/63-67 truck. You may also need the rear crossmember from a TF or 60's truck as the bellhousing mounts to the crossmember. You can get the side mount aftermarket tubular crossmember from a number of suppliers.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: Feb 2011 Posts: 6 New Guy | | New Guy Joined: Feb 2011 Posts: 6 | thanks for the help, i found the bell housing. any idea where i could find that rear crossmember. | | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | Usually people that install V-8's with auto transmissions in TF trucks remove the rear crossmember and replace them with the aftermarket set up's. There should be lots of them around. Post an add in the swap meet and you should get some responses.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
| | | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | If you're keeping the SM-420 4 speed, you won't need a crossmember under the back of the transmission. For the under-the-bellhousing crossmember, put an ad in the "parts wanted" forum and see if you can find somebody who has converted a V-8 truck body to a later model frame. They might be willing to make a deal on the crossmember you need. The 48 crossmember won't accept the V-8 bellhousing mounts. Up front, you'll need an aftermarket tubular crossmember to adapt to the side mounts on the V-8.
Jerry
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| | | | | Joined: Feb 2011 Posts: 6 New Guy | | New Guy Joined: Feb 2011 Posts: 6 | i was working on it today and with a little bit more cutting and welding i'll get this crossmember to work with my 56 bellhousing | | | | | Joined: Jun 2015 Posts: 7 New Guy | | New Guy Joined: Jun 2015 Posts: 7 | Hey there 48 chevy bus guy...i also have a48 school bus that i am beginning to renovate ..any info or tips you can send my way would be awesome ...i would love to share pics of the progress or lack there of and see yours as well ! My email address is. [email protected]. It would be great to share stories with a common interest ! Take care :) | | |
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