300 to 351, help?
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Joined: Dec 2010
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300 to 351, help?
Hey All,
My 300 in my 87 5speed 2X4 finally kicked the bucket, after hauling my truck up Michigan porcupine mountains with a blown headgasket between the 5 and 6, she still pulled and drove home dry ( I was boned in the middle of the wild, used ditch water for a while
)
anyways, Im a rather broke college student.
after changing the gasket, and reassembly the motor ran like garbage, burned oil like a monster, has 30% original power. kinda sucks bad.
I received a carburetor 351 windsor out of a van, built by a neighbor for use in his project truck, but was replaced with a 460.(lucky)
Anways, I know that I will need motor mounts, radiator and exhaust. on to my questions
what else will I need,
will my clutch work??
Second I plan on replacing my mazda M5OD2 for my older original 87 4 speed, it was freshly rebuilt, but I replaced it with the Mazda. I heard they were unreliable thoughts?
and the bolt pattern for a 300 is the same as the 302 and 351, correct? will I need new trans mounts/drive shaft
thanks all!
My 300 in my 87 5speed 2X4 finally kicked the bucket, after hauling my truck up Michigan porcupine mountains with a blown headgasket between the 5 and 6, she still pulled and drove home dry ( I was boned in the middle of the wild, used ditch water for a while
)anyways, Im a rather broke college student.
after changing the gasket, and reassembly the motor ran like garbage, burned oil like a monster, has 30% original power. kinda sucks bad.
I received a carburetor 351 windsor out of a van, built by a neighbor for use in his project truck, but was replaced with a 460.(lucky)
Anways, I know that I will need motor mounts, radiator and exhaust. on to my questions
what else will I need,
will my clutch work??
Second I plan on replacing my mazda M5OD2 for my older original 87 4 speed, it was freshly rebuilt, but I replaced it with the Mazda. I heard they were unreliable thoughts?
and the bolt pattern for a 300 is the same as the 302 and 351, correct? will I need new trans mounts/drive shaft
thanks all!
Posting Guru
Joined: Feb 2010
Posts: 2,006
Likes: 2
From: CASA GRANDE AZ
you will need a flywheel for the 351 and the clutch should work ! bolt pattern is the same !
if you change the tranny most likely will need a new mount ! there is always little things that you will need as well !
if you change the tranny most likely will need a new mount ! there is always little things that you will need as well !
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Both the motor mounts and towers(the part riveted to the frame) have to change, you'll need a V8 rad and hoses, and a 28oz imbalance flywheel to match whatever trans you use. There is also the issue of accessory brackets and of course some wiring.
Posting Guru
Joined: Jun 2004
Posts: 2,058
Likes: 2
From: Cookstown
I used my 4.9 rad when I did my swap. Took a little bit of work but she turned out just fine
