Is a stock 4.8 enough for a K5?

[Oilbrnr]

So I have a complete 2007 4.8 truck motor, harness, and PCM. Destination would be a '77 K5 with a SM465/205 that I want to keep.

Will this engine be enough to use as a daily driver until I can either build up a 5.3 or 6.0? I'm running 33's with original gears. Seems like the 4.8 and the old Goodwrench 350 crates are rated about the same hp/lbs., though I know ft/lbs in low RPM situations might be dramatically different...

I figure much of the conversion costs will be fixed anyway regardless of which motor I go with; flywheel, clutch, fuel, wiring, etc., etc.

Thanks for any input.

[AceX]

I'm working on a conversion right now to put a 6.2L in an '85.

There's ALOT involved that you really never think about until you talk to someone who's done it, and worse yet, have to make it pass CARB emissions...

The guys @ Speartech and S&P have been unbelievably helpful in figuring things out.

Street and Performance (S&P) can get you everything you need and have real world experience doing this stuff.

Just for you: 77chevy

[George C]

4.8s rock!!!!

[LEEVON]

cam it and call it a day

[AceX]

The 4.8 will eat boost like a fat chick eats cupcakes.

[99sierra4x4]

i would say that the 4.8L will more than surprise you. probably has more power than the stock engine that came with that truck.

My dad had one with a manual in it when i was a kid that thing rocked.

[GasGuzzler]

My 4.3 has more power than the stock 350 that came in it and that says nothing.

[Oilbrnr]

My 4.3 has more power than the stock 350 that came in it and that says nothing.

Nothing or something?

[GasGuzzler]

Nothing or something?

Nothing. You won't be happy with a stock 4.8. If so, save some money and put in a 4.3. They're cheaper and lighter and almost the same power stock.

[George C]

Nothing. You won't be happy with a stock 4.8. If so, save some money and put in a 4.3. They're cheaper and lighter and almost the same power stock.

confused 180hp/240tq vs 275hp/285tq