[demodonny]

has anyone had trouble with clearance for this type of build i am using a 6.8 h-beam rod 4.3 stroke crank in a 71 460 block any info on this type of motor would be helpful as i am wanting to build ths engine for my mud truck. Thanks Donny

 

[Paul Kane]

has anyone had trouble with clearance for this type of build i am using a 6.8 h-beam rod 4.3 stroke crank in a 71 460 block any info on this type of motor would be helpful as i am wanting to build ths engine for my mud truck. Thanks Donny

With the typical steel connecting rods that come in the stroker kits, the Ford 521 combos that use the 4.300" stroke crankshaft have no crankcase clearance issues whatsoever, nor do the 4.500" stroke crankshafts. Often, even the 4.500" stroke cranks don't have clearance issues with some aluminum rods (but not all).

Paul

 

[rmcomprandy]

The ONLY clearance issues I have encountered with a steel rod is when someone tries to use an inexpensive 5140 steel, THROUGH bolt rod in their combination.
The bolt heads on those specific rods sometimes hit the bottom of the opposing bores so, don't use those rods with any stroke longer than 4.150" and there will be no problems with them either.

 

[demodonny]

thank you guys for your information i am eager to build this motor as i think it will be way better than my 408 stroker that i have ran the last three seasons.