Reply to "UK GT5 Full engine rebuild - 351 Cleveland aiming for 400bhp"

WOW! Dan, that is some superb information, thank you so much.

Mike Huddart at Huddart Engines(http://www.huddartengines.co.uk/) has now made a full evaluation of my engine and alas it seems that the block and crank are not going to make it, the wall thickness is just not there anymore. He has very kindly sourced me a thick walled Australian block.

He is going to supply a replacement cylinder block, fit the existing four bolt caps, line bore, bore and hone cylinders to plus .020 " with torque plates fitted and machine the deck surfaces.

We are going to convert the cylinder heads to unleaded spec. with hardened exhaust sets, bronze guides, repair damaged exhaust mountings, rebuild with new Ferrea stainless valves, new Comp Cam springs, retainers and locks.

The existing Holley carburetor as fitted is too small for 400 HP, We're going to fit a Holley "Street Avenger "

We'll be fitting a new Scat steel crankshaft, Scat longer than stock con rods, Probe forged pistons, molly rings, heavy duty bearings, high perf. steel damper, a billet steel flywheel, Centerforce HD diaphragm clutch assembly. Dynamically balance complete assembly.

There will be Lunati hydraulic camshaft / lifter kit, new cam bearings, hardened pushrods, replacement rockers. double roller timing set

High volume oil pump, heavy duty driveshaft. High volume water pump

Pertronix Electronic distributor, coil, plug leads, plugs

He'll then be building the engine, mount it on the dynamometer, run in and tune and then re torque components.

SO THE BIG QUESTION IS:

To supply as 351spec ( 5.8 Ltr ) @ around 420 HP

OR

To supply as 393 stroker spec ( 6.4 Ltr ) @ around 460 HP

Any input or comments that you have would be very much appreciated.

He has also uggested upgrades at this time which I am almost certainly going to go for.


Convert cylinder heads to "Boss" spec adjustable valve train with screw in 7/16 rocker studs, pushrod guide plates and full roller aluminum rockers plus the extra machining to cylinder heads.

Canton extra capacity, winged and baffled oil pan and pick up