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  #16 (permalink)  
Old 01-16-2007, 06:18 AM
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Originally Posted by 327NUT
Not to cause a pi----- match here but according to Mortec casting #3970020 is a 307 only, 69-73 2 bolt block. There are no 327/350 listed with that number. Where are you getting your info ? And to Bigdome if you are that concerned then take it back and get a REAL 350 that has a 350 casting number, Sooooo much easier.
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  #17 (permalink)  
Old 01-16-2007, 06:21 AM
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Originally Posted by Hippie
I believe it. I've been told that some bomber and street stock dirt track racers are doing it for "claimer" motors, they bore a 307 block to 4 inches and use 267 or 305 cranks and rods with std. bore 350 pistons people have taken out of 350's they bored out and then throw small chamber 305 heads on them. They run good........... for a little while, they don't have much in them and if it gets claimed they aren't out much and the other guy didn't get much.

You can also stroke a 307 using a 350 crank, 400 rods and the 307 pistons........... don't know why anyone would bother but it CAN be done.
ive also heard of dirt trackers having 400 blocks sleeved and using 283 size pistons. i dont know why though
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Old 01-16-2007, 06:29 AM
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Originally Posted by runn141
ive also heard of dirt trackers having 400 blocks sleeved and using 283 size pistons. i dont know why though
That one I hadn't heard.............
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Old 01-16-2007, 09:42 PM
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Quote:
Originally Posted by 327NUT
Not to cause a pi----- match here but according to Mortec casting #3970020 is a 307 only, 69-73 2 bolt block. There are no 327/350 listed with that number. Where are you getting your info ? And to Bigdome if you are that concerned then take it back and get a REAL 350 that has a 350 casting number, Sooooo much easier.
yup weve pretty much got that figured out...i wasnt concerned, i dont really care that much because im probably gonna just buy a new car with 305/327/350, just whatever comes my way...but if i can, i want to finish this project up, or sell it.
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Old 01-16-2007, 09:44 PM
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Originally Posted by bigdome16
yup weve pretty much got that figured out...i wasnt concerned, i dont really care that much because im probably gonna just buy a new car with 305/327/350, just whatever comes my way...but if i can, i want to finish this project up, or sell it.


take that back, i do care....just not that concerned, its just a side project while im not at school. just wanted to get some experienced help with it because this is my first rebuild.
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  #21 (permalink)  
Old 01-16-2007, 10:07 PM
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Quote:
Originally Posted by runn141
ive also heard of dirt trackers having 400 blocks sleeved and using 283 size pistons. i dont know why though
The secret is out....

If a 400 block is bored too thin it is not worth much to anybody. Usually gets junked.

By sleeving it down to a 4.000 bore, it then has extra thick cylinder walls about .210". (.185/2 + .120) I guess you wouldn't have to worry about splitting a cylinder wall, huh. Of course it still is siameezed. And probably has "hard-blok" and splayed. I think it would make a heck of a 383(377) for a blown application.

The parts/labor time would be less than buying another block, splaying, and installing hard-blok.. Might be a good salvation for 4 bolt or splayed blocks that have had the course at 4.185.
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