Hey all. Short time lurker and newb here.
Two weeks ago, I spent 4 days wrenching on my 454 for a 4 day weekend trip...And another half day working on it at the camp site!
I would LOVE to drop a diesel (overdrive mandatory!) in it but I was also thinking about a SBC and overdrive tranny swap.
Right now, the powertrain is the 454 big block, a TH400 and 14 bolt corporate with :4.56 gears. Cruising speed is about 45mph. At 55, she's singin'. At 65, she's a screamin"!
The 454 is being over spun like 80% of the time.
The manifolds were cracked when I bought it so I replaced them with headers. I KNOW they're glowing at highway speed. I haven't melted any wires or caught on fire yet!
I have the timing advanced to the threshold of audible ping and the starter binds a little on start up. It does run cooler then it did but the temp still climbs while in the mountains.
I think my RV weighs about 7300 dry.
I thought about swapping out the rear for a :3.73.
I do have a 6BT in an old Econoline bus that ran through a Ford C6. (Very nice adapter kit) I could bolt that to an E4OD with the plate already on it.
I have a 6.9L Hino 6cyl bolted to an AT545 (no overdrive!)
I thought about finding a wrecked diesel G2500 or something, with the 6.5.
Since I don't have the time or money to do any of the engine swaps I really want, I was also thinking about a (4bbl headers and cam) 305 or 350 with a 4L60/80 through that :4.56 rear.
Is anyone running a ~8000Lb RV with a small block?
I had a K30 mason dump that weighed about 6800 and the 350 with headers moved it right along...power to spare. I hauled a 6 ton track hoe on a 9 ton trailer for two years with that truck.
I think the only time I would kick myself with the small block (if at all) is if I were towing a pickup truck.
I could buy a 2WD 1990 Silverado tomorrow for $500...OBO. Engine (supposedly) rebuilt 50k ago.
Anyone have any thoughts?
Don't worry about hurting my feelings ;-)
Just pinning this onto my previous side note:
Driving my truck around for a couple days, I'm getting acquainted with it all over again. I drive it completely different now.
Looking at the new OD compared to the old one (ZF5 42 vs E4OD), the difference is, numerically, very small.
The auto had a .71 OD and my new 5 speed has a .77 OD.
The comparison via old but-o-meter, however, is profound.
That little 6/100ths of a rev makes an unbelievable difference!
Only one way to over come that problem and its about $1400. A 2 speed gear vendor gear box right behind the trans or attched to the nose shaft of the rear axel.