Originally Posted by Jamies460
Hello, Im rebuilding my 460ci and would like to find out if the stock 460ci head and cap bolts can handle 11-1 compression as i have ordered the Keith Black 401 dome pistons ( 060 over ) my 460ci is a D9TE Block- Externally balanced. would it be best to have the Crankshaft and Conrods balanced ( change spacer & Flywheel to match ) as i would like to rebuild it to High performance, i also ordered the Ford Racing camshaft M-6250-C460. Thanks Jamie.
My .02 is that given the cam, compression ratio and intended rpm range of your build, I feel that such an engine kept in good tune can very easily be built using the factory oem head bolts and main bolts...no problem whatsoever.
While a stud/girdle kit may offer some increased structural integrity to the bottom end, I personally don't feel it offers up any benefit in a mild build such as yours (let alone much improvement at all).
The 429/460 head bolts are huge 9/16 deals and are torqued to a whopping 140 foot pounds. Compare this to the "industry standard" chebby big block 454 which uses just 7/16" head bolts and are torqued to only 65-75 foot pounds. The oem Ford bolts are very strong and long lasted, main bolts included.
Even the Ford Racing 514 Stroker uses oem head bolts and main bolts and it has over 625 HP (in reality) and does this with a 4.3 stroke crank (which imposes much greater reciprocating force on the bolts than a 460's 3.85 stroke crank).