351 crank vrs 302

[dave 1970]

can anyone tell me the advantage of putting a 351 crank and roller cam in a 302 block,engine was also bored .30 over

 

[dave 1970]

can anyone tell me the advantage of putting a 351 crank and roller cam in a 302 block,engine was also bored .30 over

 

[danny clemens]

A 351 crank won't fit in a 302.

 

[joncash]

that would be cool, though

 

[brianj5600]

The early stroker used 351 cranks turned down with 2.3L rods if my memory serves me right. Now it would cost more to machine a 351 crank than a new 3.40" crank. Early in the stroker game you could buy a kit with a 3.5" stroke, but that is just a little too much for an 8.2" block.

 

[dave 1970]

thanks for the info,this motor was built in the early 90s by a reputable ford rebuilder,it definitly has a 351 crank in it ,tore the heads off it still has the hach marks on the cylinder wall,so it has very low miles ,also has a set of rebuilt heads with harded seats for 500 bucks ,i think i better grab this,was also rebuilt with all ford parts

 

[dave 1970]

thanks for the info,this motor was built in the early 90s by a reputable ford rebuilder,it definitly has a 351 crank in it ,tore the heads off it still has the hach marks on the cylinder wall,so it has very low miles ,also has a set of rebuilt heads with harded seats for 500 bucks ,i think i better grab this,was also rebuilt with all ford parts

 

[302 coupe]

whats the casting number on the crank? I suspect you have very very minimal chances of having a 351 crank in a 302 block, especially with "all ford" parts.

for casting number, look on the forwardmost counterweight. 221/260/289 will have "1M". 302 are "2M". 351W is 3M, 3C, or 3M A. 351C cranks are 4M I think. If you see a 3M, proceed to measure deck height to see if its a 289/302 block or 351 block. 302's are 8.2", 351W is 9.2".

 

[D.Hearne]

More likely they used a 351C crank to do this. You'd have to take too much metal off a Windsor crank to do this. The Windsor mains are something like 3/4" (.750) larger than a 302. The Cleveland mains are closer in diameter to the 302. Cheaper to just use a 3.4 stroker crank now. If you want 352 cubes, just bore the 302 block .060 and use the 3.4 crank.

 

[bnickel]

More likely they used a 351C crank to do this. You'd have to take too much metal off a Windsor crank to do this. The Windsor mains are something like 3/4" (.750) larger than a 302. The Cleveland mains are closer in diameter to the 302. Cheaper to just use a 3.4 stroker crank now. If you want 352 cubes, just bore the 302 block .060 and use the 3.4 crank.

D beat me to it. it is possible to turn a 351c crank down to fit a 302 block and it really isn't even all that difficult really but definitely not very practical today.

 

[rbohm]

yep, jack roush used a modified 351c crank in a 302 block when he built the indy pace car engine for the 79 mustang.

 

[danny clemens]

The early stroker used 351 cranks turned down with 2.3L rods if my memory serves me right. Now it would cost more to machine a 351 crank than a new 3.40" crank. Early in the stroker game you could buy a kit with a 3.5" stroke, but that is just a little too much for an 8.2" block.

I guess I should have said won't fit without modification. I had no idea that the C crank would work with machining. I learn something new all the time.

 

[dave 1970]

whats the casting number on the crank? I suspect you have very very minimal chances of having a 351 crank in a 302 block, especially with "all ford" parts.

for casting number, look on the forwardmost counterweight. 221/260/289 will have "1M". 302 are "2M". 351W is 3M, 3C, or 3M A. 351C cranks are 4M I think. If you see a 3M, proceed to measure deck height to see if its a 289/302 block or 351 block. 302's are 8.2", 351W is 9.2".

hello ,i pick it up sat,will check the numbers you gave me,thankyou