4.2 to 302
Senior User
Joined: Oct 2003
Posts: 117
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From: Cincinnati
Originally Posted by true4.2
Our motors are a stroked 3.8 yes, but I don't think the transmission bost pattern or whatever matches the 302 bolt pattern.
From what I've read on this site about the Mazda transmissions in the 4.2's, even if you get it all to work properly the 302 torque will kill the tranny real quick anyway.
Junior User
Joined: Apr 2002
Posts: 97
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From: Arcadia US
Why don't you just get an M50D out of the truck your getting the engine out of and put that in there too. If the crossmember needs to be modified, modify it, you'll have a lot better truck in the end than a 4.2 truck.
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Senior User
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From what I've read on this site about the Mazda transmissions in the 4.2's, even if you get it all to work properly the 302 torque will kill the tranny real quick anyway.
I cant remember any stock 302 truck engine that was a big torque monster???ive owner a couple early 90s models and they werent all that strong......modified yes, stock I think it could hold up......
am I wrong????
I cant remember any stock 302 truck engine that was a big torque monster???ive owner a couple early 90s models and they werent all that strong......modified yes, stock I think it could hold up...... am I wrong????
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Posting Guru
Joined: May 2004
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From: Indiana
weve got one of the 302, all i know is it can ROAST EM!! that thing kicks and the tires wont b stoppin..its pretty beastly
weight in the bed / trailor does bog it down more than i thought though..
weight in the bed / trailor does bog it down more than i thought though..
Senior User
Joined: Oct 2003
Posts: 117
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From: Cincinnati
Originally Posted by strick4.2
I cant remember any stock 302 truck engine that was a big torque monster???ive owner a couple early 90s models and they werent all that strong......modified yes, stock I think it could hold up...... am I wrong????
The 302 doesn't make a whole lot of torque in stock form, right around 300 ft-lbs, about 50 more than the 4.2 does. But who wants a stock engine
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Joined: Jun 2003
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From: Lufkin
The 3.8 (so I assume the 4.2 does too) has the same bellhousing bolt pattern as the SBF. I believe the input shaft length is different, or maybe the # of splines on the input shaft is different, or both. You'll also need to get the right flywheel/clutch combo.
Senior User
Joined: Oct 2003
Posts: 117
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From: Cincinnati
Originally Posted by homer4.2
And the 4.2 has 10 more hp than those old 302's, the 5.0's....
Oh well, hopefully next year some time I will be able to begin adding to that number
Posting Guru
Joined: May 2004
Posts: 1,214
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From: Indiana
heh, yea its funny how a 5.0L is alot bigger than our engine AND its a v8 and we still put out 205 hp compared to 165.......technology does wonders
in 20 years a v6 (if they dont have hovercrafts) will put out like 500 hp stock
in 20 years a v6 (if they dont have hovercrafts) will put out like 500 hp stock
Postmaster
Joined: Jun 2003
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From: Lufkin
No, in 20 years we will probably be running all electric vehicles due to gas prices being $321/gallon. 
I'm thinking honestly, that gas vehicles will be considered 'classics' in the next 50 or so years.
I'm thinking honestly, that gas vehicles will be considered 'classics' in the next 50 or so years.