Hot Rod Forum banner
1 - 4 of 4 Posts

·
Registered
Joined
·
13 Posts
Discussion Starter · #1 ·
Ok, I’m in desperate need of help. The past year I’ve been slowly building a 350 for my 1982 c10. The 350 came out of an 87, so it has a 1 piece rear main, and I’m having trouble coming up with how to bolt the new 350 to my transmission. (Th-350c)
My main issue is the fact That the 2pc rear main motors had a larger flex plate, where the 1pc rear main motors had the smaller. My new flex plate will not bolt to my lockup converter in my th-350c, and I’m having trouble finding a smaller diameter lockup converter. I think I can drill new bolt holes in the smaller flex plate to fit the larger torque converter, but I’m not completely sure. Another thing, is there a difference in starter between the 2pc and the 1pc motors?
Need answers ASAP, thanks!

-hoongoon
 

·
Registered
Joined
·
13 Posts
Discussion Starter · #2 ·
Ok, I’m in desperate need of help. The past year I’ve been slowly building a 350 for my 1982 c10. The 350 came out of an 87, so it has a 1 piece rear main, and I’m having trouble coming up with how to bolt the new 350 to my transmission. (Th-350c)
My main issue is the fact That the 2pc rear main motors had a larger flex plate, where the 1pc rear main motors had the smaller. My new flex plate will not bolt to my lockup converter in my th-350c, and I’m having trouble finding a smaller diameter lockup converter. I think I can drill new bolt holes in the smaller flex plate to fit the larger torque converter, but I’m not completely sure. Another thing, is there a difference in starter between the 2pc and the 1pc motors?
Need answers ASAP, thanks!

-hoongoon
Guys, I feel stupid, In my panic, I was looking for the wrong thing, I didn’t think anyone would make a 168 tooth (old style) flex plate for a 1pc rear motor... facepalm... speedway motors has one for $23.99! Anyway, I’m still open for info though!
 

·
Registered
Joined
·
76 Posts
Be careful here the engine sounds like it may be externally balanced the flexplate should have an external balance weight. Kindly double check any info you get from anyone . we are just trying to help and I had this same problem.
 

·
Registered
Joined
·
13 Posts
Discussion Starter · #4 ·
Be careful here the engine sounds like it may be externally balanced the flexplate should have an external balance weight. Kindly double check any info you get from anyone . we are just trying to help and I had this same problem.
Yes sir, I just got a flex plate for the 1pc engine. The flex plate bosses on the crank are different size, so a 2pc plate is too large to bolt to the 1pc crank, and the 1pc plate will physically not bolt to the 2pc crank. Yes, the new one has a weight
 
1 - 4 of 4 Posts
Top