I am swapping out my tired '89 305 (one piece rear main seal) for a newly rebuilt '76 350 (two piece rear main seal) and was wondering if I could still use my stock bellhousing and flywheel from '89?

 

The bellhousing will work on all Chevy smallblocks (up to, but not including LS1/LS6), 4.3 V6's, and bigblocks. However, the flywheel will not work since your '89 uses a 1-piece rear main and you have a 2-piece. Just get an old style 350 flywheel.

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1992 Camaro Z28; Engine:383 w/Ported Edelbrock RPM heads. Lunati Solid Roller Cam 224/232 .502/.502, Fluidampr, Comp Cams 1.5 Roller rockers and lifters, Comp Cams Triple Valvesprings, SVO 30 lb injectors. Holley/Walbro 255 lph in-tank pump, Haltech E6GM DFI, SLP 1 3/4" headers, 4" Mufflex, T56, SLP Clutch, Pro-5.0 Shifter, 4.10 Gear, Auburn Offroad Pro Posi. Super Ram. 17" X 9.5" Ronal FireHawk Rims w/ 275 40ZR17 Bridgestone RE 730's up front and Nitto Drag NT 555R's out back.

Double-Pump This! EFI Rules!

 

Frank is right about the bell housing. However, most 350 flywheels won't work for your swap, because they're 14", and a 14" won't go in the only bellhousing that fit these cars, which only accommodates the 12¾" one. The flywheel to get is the one for a 83-84 HO 5-speed car. The one from the LG4 in those years will also work, but the HO one is the lighter one, and therefore better in this application.

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