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Author
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Topic: engine swap 69 mach 1 to a bigger motor
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azwhiz
Journeyman Posts: 11
From: Scottsdale
Registered: Jan 2003
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posted 01-05-2004 09:01 PM
   
I have a 69 mach 1 351 W with a dead motor, time to rebuild it or put in a hemi. I have a 4 speed tranny. What motor will drop in with the least problems. What will bolt up to the tranny. Which motor will I have to cut the shock towers. 390? 428? 429?
460? Which motor has the highest tourque and horsepower,
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RonnieT
Gearhead Posts: 827
From: Port Allen, La. 70767
Registered: Jun 99
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posted 01-05-2004 09:14 PM
azwhiz, You can put any of the motors listed without having to cut the shock towers. The BOSS 429 required modifications to the towers.
The 429/460 is the only engine that was not an option in the 69, but it will fit in the engine bay. I think that Crites makes a engine swap kit and headers to install the 429/460 engines into a 69. Just looked at your post again, your question about the 4 speed, if it is behind the 351W now then you have a small block bell housing and it will only fit behind a 289/302/351W/351C. You could get a big block bell housing, but I think the 4 speeds are also small block or big block specific. The trans might not stand up behind a big block for long. The easiest thing is to rebuild your 351W. You could even build a 393 or 408 stroker and have more than enough power for a street car. ------------------
Ronnie
69 mach1 351W-4V engineless at the time!
70 Torino GT 351C-4v with a "shaker"
Mustangs and More Member #23 [This message has been edited by RonnieT (edited 01-05-2004).]
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N266fords
Gearhead Posts: 1380
From: Spokane ,WA USA
Registered: Apr 2003
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posted 01-05-2004 10:59 PM
my buddy has a 69 mach 1 with a 460 and the #1 header pipe goes under the pan to the other side and so does the #5 pipe 1 7/8 headers other than that it looks at home and he is running 3 inch daul exh all the waty out. Justin is his name from seattle wa. bruce
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grandestang
Gearhead Posts: 374
From: Lake Bluff, Illinois USA
Registered: Jan 2003
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posted 01-06-2004 12:14 AM
As said, build a 393 or 408 stroker out of the Windsor. Its a strong engine and with the right parts you'll make more power than you'll even need. Plus you can tell those chevy boys you just kicked their ass with a 'small' 351W.  This may be less of a hassle for you than trying to squeeze a 385 series big block in there. Paul ------------------
1970 Grande
H code 351W FMX [This message has been edited by grandestang (edited 01-06-2004).]
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68 S-code GT
Gearhead Posts: 2416
From: Sayreville, NJ, US
Registered: Mar 2000
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posted 01-07-2004 11:43 AM
quote:
Originally posted by grandestang:
This may be less of a hassle for you than trying to squeeze a 385 series big block in there. Paul
Or changing plugs, tightening header bolts or for whatever reason you have to fish around down along side of the engine.
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Gary
Gearhead Posts: 726
From: Sarasota, Fla. USA
Registered: Jun 99
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posted 01-09-2004 06:29 PM
I have a 69 Mach pro-street with bored and stroked 460 to 528cid and 4sp. I think it's easy to work on, in fact changing plugs is easier than my other 69 Mach with 351C.[This message has been edited by Gary (edited 01-09-2004).]
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