swapping a 305 to a 360 69 block???
Thread Starter
Junior Member

Joined: May 2000
Posts: 83
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From: Beale AFB, CA, USA
Car: 91 RS
Engine: 305
Transmission: 700r4
swapping a 305 to a 360 69 block???
Ok, here it goes. Hopefully you all could be a great help to me, i am swapping my little 305 out and replacing it with a 360 (350 bored 60 over) out of a 69 vette. The motor has a whole forged bottom end and 327 ported and polished heads. The heads have bigger valves and stronger springs. I dont know exactly what kind of springs and valves but they are bigger than stock of course. My question would be if i could get this block to run with a TBI computer controlled unit?? Also were would i be able to get a prom chip for this kinda stuff?? I hope to have this motor up and running by May of this year, it is already put togather but i have to work out everything for the TBI swap. Is there an aftermarket TBI that i can actually find for a good price?? Also where can i put the Knock sensor at??
Thank you for any of your help and please also if you could help find me a nice size camshaft that i can run please let me know of one??
Lata
Thank you for any of your help and please also if you could help find me a nice size camshaft that i can run please let me know of one??
Lata
Thread Starter
Junior Member

Joined: May 2000
Posts: 83
Likes: 0
From: Beale AFB, CA, USA
Car: 91 RS
Engine: 305
Transmission: 700r4
you know after you said something about it, it comes out that you are right, damn that sucks. I will have to buy a set of 89 iroc heads and use those instead. Oh well stuff happens.
Some issues you need to figure out:
1) Driver's side dipstick on the 60's engine won't fit stock manifolds.(You probably wont be using stock manifolds anyway!)
2) Center two intake bolts to each head are a different angle on the TBI manifold (using an aftermarket pre '87 4bbl intake will solve this)
3) '85-prior engines used two-piece rear main seal, which will require a different flexplate/flywheel. (This can be solved by using the tranny that came with the engine ie.muncie,th350/400)
4)The starter probably will not bolt up. You'll need to drill a hole. get a machine shop to do it for you, it shouldn't cost alot.(Thats if you are going to use a newer starter, if you use the old one that is with the block and tranny, then this doesnt apply)
I already went through this cause my dad had a 283 lying around collecting dust so I wanted to swap out the 305, but it was too much of a hassle it seemed. Who knows maybe someday I will get around to it.
1) Driver's side dipstick on the 60's engine won't fit stock manifolds.(You probably wont be using stock manifolds anyway!)
2) Center two intake bolts to each head are a different angle on the TBI manifold (using an aftermarket pre '87 4bbl intake will solve this)
3) '85-prior engines used two-piece rear main seal, which will require a different flexplate/flywheel. (This can be solved by using the tranny that came with the engine ie.muncie,th350/400)
4)The starter probably will not bolt up. You'll need to drill a hole. get a machine shop to do it for you, it shouldn't cost alot.(Thats if you are going to use a newer starter, if you use the old one that is with the block and tranny, then this doesnt apply)
I already went through this cause my dad had a 283 lying around collecting dust so I wanted to swap out the 305, but it was too much of a hassle it seemed. Who knows maybe someday I will get around to it.
Thread Starter
Junior Member

Joined: May 2000
Posts: 83
Likes: 0
From: Beale AFB, CA, USA
Car: 91 RS
Engine: 305
Transmission: 700r4
would there be any way that i could use my stock tranny with this set-up, I have had an awful lot of work done to my 700r4 tanny and i would love to use it......???????
If you know of a way please let me know so i can try and find the stuff right now
If you know of a way please let me know so i can try and find the stuff right now
There is maybe a possibility of getting a different flexplate for your Th700r4 maybe to work with the older engine. Maybe try posting this under Motor Swap...you might get some better responses
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