92 GMC truck 370 swap
#1
TECH Resident
Thread Starter
iTrader: (2)
Join Date: Feb 2013
Location: Brunswick, GA
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
92 GMC truck 370 swap
Getting my 92 pickup ready for a 370 ci swap. Got the motor out of an 02 Denali with 160,000 miles on it and heard it run before i purchased it. It was supposed to be a budget build but when i got the heads off 2 of the cylinder walls were pitted ( steam cut ) from coolant leaking into the cylinders. So i decided to go ahead and build a 370. Been gathering parts over the past 2 months, got married and having to get this thing bored out has slowed me down a little bit. I hope to have the block at the machine shop by early August. Here is a rundown of the setup. A 6.0 block bored out .030. I will be using Scat I-beam rods with Wiseco flat top pistons with 3.22 cc valve reliefs. JP performance double roller timing set. Havent decided on which oil pump yet, any suggestions high pressure, high volume, stock replacement? ls7 lifters. New pushrods once i measure for them. Stock 317 heads, possibly milled .02. Brian Tooley Platinum valve springs. Stock valves and rockers with trunnion upgrade. ARP head bolts. Edelbrock RPM performer intake. Quickfuel 750 cfm vacumm secondary. I will be getting martin@Tick to spec me a cam. I will also run a 100 shot of nitrous later on. I also have a th350 tranny with a JW bellhousing i will be getting rebuilt to use. Converter will be dependent on the cam i get. Truck will be 90% street 10% strip so thats why i went with the dual plane and vacumm secondary carb. If i get more serious about racing it i will probably switch to a single plane and a bigger carb and more nitrous. Here is a pic of my truck the motor is going in.
The motor before really tearing it apart.
Block getting dissassembled
Block down to bare bones
Will try to load some more pictures tomorrow. Posted on this forum since I'm going carbed figured yall would like to see it.
The motor before really tearing it apart.
Block getting dissassembled
Block down to bare bones
Will try to load some more pictures tomorrow. Posted on this forum since I'm going carbed figured yall would like to see it.
#6
TECH Resident
Thread Starter
iTrader: (2)
Join Date: Feb 2013
Location: Brunswick, GA
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
Did a little redneck machining today. I got a long sanding block and some 400 and 600 grit and sanded the gasket surfaces. Checked with a machinist straight edge and feeler gauges and was less than .003 on flatness. Bottom of the heads will be milled so it doesn't really matter on the bottom surface. Some before and after pics.
Also checked my crank today and a few journals had some light scratches on them so I put it on my lathe and got some 2500 grit sandpaper and lightly sanded them using a straightedge cut for each journal so it would not taper the journals. All journals are within spec.
Also checked my crank today and a few journals had some light scratches on them so I put it on my lathe and got some 2500 grit sandpaper and lightly sanded them using a straightedge cut for each journal so it would not taper the journals. All journals are within spec.
Trending Topics
#12
TECH Resident
Thread Starter
iTrader: (2)
Join Date: Feb 2013
Location: Brunswick, GA
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
It's a 750 yeh it's new but I bought it off a guy that never took it out the box. Yeh I noticed that on the MSD box when I mounted it! I may end up mounting it on the firewall so I can drive with the laptop hooked up.
#14
TECH Resident
Thread Starter
iTrader: (2)
Join Date: Feb 2013
Location: Brunswick, GA
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
Well the truck isn't a daily driver so I will beat on it pretty hard but will mostly operate in the 2500-5000 rpm range and from my research the dual plane has a significant advantage in that rpm range over the single plane. Though it will probably be hard for me to keep it away from the track once I get it driving. If I start racing it more I will definitely move to the single plane and more nitrous.
#17
11 Second Club
iTrader: (46)
Join Date: Oct 2002
Location: tulsa ok
Posts: 1,617
Likes: 0
Received 0 Likes
on
0 Posts
i opted for painted for now until all fitment issues are solved and then ill send them off locally to get coated after i put the v bands on them also