i work for for a company that makes performance boat motors (oem)any ways i have a chance to buy one of are 377 stroker motors for a good deal it has vortec heads roller hydrolic lifters i know it was dino tested at 360 horse with fuel injection set up but it has been switched to carb has the edlebrock rpm intake it has 9.675 compression i want to put it in my 84 z28 to replace lg4 just wanted to know what you guys think

 

How much money?

The 377 is a .030" over 400 block with a 350 crank. Think of it as a hugely overbored 350, or a de-stroked 400. It will not have the starter bolt holes to go with the 153-tooth flywheel; so if you have a 5-speed, it won't work unless you get the missing hole drilled, which is probably not something you can easily get right yourself.

On the other hand, considering that 360 HP is more than double what you have now, it would revolutionize the car. You will have trouble with hood clearance. You will need an exhaust system, from heads to street, otherwise you'll end up with a 145 HP 377.

------------------
"So many Mustangs, so little time..."
ICON Motorsports

 

I think there are 2 different combinations for a 377; One is a 400 block with a 3.48 inch crack (350).

The other is a STANDARD bore 350 block with a 3.75 inch crank. Note; A 383 is a 4.030 bore with a 3.75in stroke.

Someone please enlighten me if this is wrong.

------------------
L98, 3.27 9-bolt, Hooker shorty headers, custom 2.5inch Y-pipe, no cat, 3inch 2chamber flowmaster, JET AFPR, Ported MAF, Best ET: 13.86 @100mph. 1.99 60'
17 inch ROH "ZS" wheels. 17x8.5(front) and 17x9.5 (rear). Firestone Firehawk SZ50s. 245/45/zr17s and 275/40/zr17s. T56

On the way... Radar Blue 89 Formula, T56, Ram Jet 430, Ram Air, 17inch ROHs.

 

That is wrong, although you're very close. A std bore 350 with a 400 crank gives a 378.

------------------
"So many Mustangs, so little time..."
ICON Motorsports

 

here are the specs from are factory manual bore 4.00 stroke 3.75 displacement6.2 ihave heddman shorty hedders and y pipe already

 

Well that's OK too. Basically you have a 383 except without the .030" overbore. BTW I just went and calculated it and 377 is right, so I was wrong. My bad.

In that case, you may have to concern yourself with the balanced / unbalanced situation and the 1-piece / 2-piece rear main seal issue, and maybe the starter bolt hole issue as well. That all depends on exactly how it was built, for which there are a number of possibilities.

How much money? It sounds like a nice motor as far as that goes, but may require some additional expense and special treatment to go in there; and it may be possible to duplicate it from a junk block and so forth for less money. Close to a drop-in but not quite, and impossible to tell if it's a good value to do it that way or not.

------------------
"So many Mustangs, so little time..."
ICON Motorsports

 

Also, putting a 350 crank in a 400 block needs special bearing spacers since the 350's main bearing journal is smaller than the 400's. No big deal. They're available at speed shops. At least you don't need to machine the crank.

------------------
Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
461 Big Block installed and ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

its a GM block so i dont think i have to worry about the starter balancer already comes with it it is pretty mutch complete cant say how much it costing me someone might get in trouble well say less than what it would cost to have the machine work done to make a 383

 

I wish I could come up on something like that for my Elcamino. Hell, for any of my cars. I would love to have a destroked 400. A higher reving, road racing engine.

------------------
'82 Firebird, dead stock, 9 bolt disc rear, over 200,000 miles and still going strong, more to come...
http://www.spinfrenzy.com/stingerssx...easures.html#4