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Putting A Little Pep In My 390's Step

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Nightmist66:
This build started out 3 years ago after I had a collapsed hydraulic lifter I was fighting. I just wanted to swap to a slightly larger solid flat tappet and run Drag Week '17. Well, one thing led to the next and the engine is out of the car and bare block. Glad I took it apart. Went to machine shop to have it cleaned up and found a crack on the #4 main. Rats. So, the original block and heads went into storage and gave me a good excuse to build it better. This is part 2 of the rebuild. Couple problems last year on first go around and decided to do it better this time.

This will be pic heavy, grab a beverage and get comfortable.

Basic run down of setup:

D4TE-1 block from a dump truck, dist. bushing from POP installed
2U crank from original 390
Scat 6.490" h beams with ARP 2000 bolts
Custom CP 4.085" flat tops, 8cc reliefs with metric 1.5, 1.5, 3.0mm rings (Napier second)
Custom 4140 cross-bolt main caps
Ishihara Johnson crank scraper
Canton screen windage tray
Schumann HV oil pump, POP billet drive, POP oil pump studs
Milodon 31130 oil pan and matching pickup
Solid roller cam, Crower hippo lifters (Not releasing cam specs)
Jay's timing set with Pioneer steel thrust plate
Blair's street pro port heads w/ 2.200, 1.650" valves, street exhaust port, 53cc chamber
Victor Reinz #3389 head gasket for 12.5:1 compression
Edelbrock RPM intake port matched and plenum mods
Erson rockers with upgraded DSC shafts and custom 7075 stands, ARP studs
Smith Bros. pushrods
NGK race plugs #7 heat range
Factory dist. with Pertronix Ignitor III, light advance springs, quicker curve, Crane steel gear
Scratch built 750 annular currently, probably switch to an 820 BG annular once in car
King main bearings, Federal Mogul rod bearings, Durabond FP-33 cam bearings
Factory 427 dual port oil filter adapter, modified
Pioneer SFI damper with billet aluminum crank spacer, oil slinger
C3AE timing cover
Ford Racing billet steel flywheel
PRW HV water pump, logo removed/ Robert Shaw high flow 160 t-stat
PBF covers going on in car, switching to Moroso Ultra 40 wires, Pertronix digital HP ignition box
Factory starter
Mad Dog 2" headers into some custom merge collectors

Nightmist66:
Starting with the mirror 105 block, it was cleaned and magged. Extensive oil mods throughout. Went to a local machinist who made some nice custom cross bolt main caps. I told him what I was looking for and he delivered. 4140 steel caps with 2-2 1/2 thou press on each side into block skirt. I told him keep them close to pan rail to not cut as much from the main webbing.








#5 cap modified for studs. Deburred edges later on...


I later added some 3/8"-24 shallow holes for slide hammer removal

Nightmist66:
Block needed four sleeves, two on each bank. No sleeves were adjacent cylinders, luckily. I unshrouded for the big valves. Block decked and left pistons .003" down. Crank was still at stock journal size. Crank was cleaned, magged, shot peened, ground, and polished. I ordered 10 under bearings for mains and rods and had clearances set. Crank also got some special treatment after it left the machine shop.

Rods and pistons:

Nightmist66:
Blueprint everything. Here is why you should spotface or mill the bolt hole pads flat on the oil pump. New pump mocked up with studs snugged up:




A couple oil mods to the heads. Radiused feeds, enlarged and blended drainbacks, and tapped feed hole for 12-28 set screws drilled for restrictors.







Heads got some logo removal for a stock look once painted. Rough cut here and finished with some sanding.

Nightmist66:
Rotating assembly in and checking fitment for crank scraper and windage tray. Crank scraper took some fine tuning to get everything in check. I removed the small scraper from the Canton tray.

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