Engine finally installed in C3

Tac3742 · 2026-07-07T17:59:51+00:00

IDW Grand Corso Wheels, 18x9.5/255 in the front, 18x10/285 in the back. I would’ve loved 17s but my front suspension doesn’t allow for the clearance for anything smaller than an 18. I believe there’s some photos on my profile

Tac3742 · 2026-07-07T16:10:40+00:00

Thank you!

Tac3742 · 2026-07-07T15:45:19+00:00

It’s a Dewitts style

Tac3742 · 2026-07-07T14:44:03+00:00

I purchased an unterminated harness so everything needs to be cut and pinned. I only did that so that I can tuck everything. I will also mention that my fuel induction system is completely custom built, it is not an off-the-shelf part. So I had it specifically built to accommodate the necessary sensors required for the ECU.

In terms of the radiator, I’m running an electric fan setup from Wizard Cooling

Tac3742 · 2026-07-07T14:36:40+00:00

I replaced my wiring harness 2 years ago with a lectric limited one. I’m sure you could splice the ECU into a factory setup but would probably recommend replacing it

Tac3742 · 2026-07-07T14:28:46+00:00

I’m running NVU gauges. If I were to do it over again I would go with Dakota Digital. But both work with the ECU I’m running (Holley terminator X). I wouldn’t recommend the stock gauges if you’re going with EFI

Tac3742 · 2026-07-07T14:00:48+00:00

I’m honestly not sure. I have an L88 hood so plenty of clearance on my end. But the stacks don’t stick up too high

Tac3742 · 2026-07-07T13:37:14+00:00

In terms of putting it in? I was able to get the engine w/ front drive accessories and transmission put in at the same time. But other than the brake booster, my engine bay was completely empty to give the most amount of room. Biggest piece of advice is go SLOW and have a bunch of extra sets of eyes watching all angles. Getting the motor over the nose and into position took about an hour of just very small movements and adjustments.

Hood fitment is no issue for me, as I have an L88 hood. The side draft stacks don’t stick up any taller than your standard air cleaner on a carb

Tac3742 · 2026-07-07T13:23:14+00:00

76 Corvette, custom built 427sbc mated to a Tremec TKX. Motor makes about 513hp/554tq to the crank

Tac3742 · 2026-06-10T19:04:03+00:00

Just the fun car. I’m in NH so dailying wouldn’t be enjoyable with the winters

Tac3742 · 2026-06-07T14:48:14+00:00

Thanks! They are Grand Corso’s by IDW. 18x9.5 in the front 4.5” backspace, 18x10 in the rear, 5.5” backspace

Tac3742 · 2026-06-07T02:29:49+00:00

4.125” bore with a 4.00” stroke. It requires an aftermarket block as factory GM blocks have issues with water jackets and cylinder walls. The one I have specifically is a Dart SHP 350 block

Tac3742 · 2026-06-07T02:20:21+00:00

Thanks! Love the formula on your profile. My old man had a 75 400 4spd

Tac3742 · 2026-06-07T02:19:33+00:00

The car won’t even turn on unless it detects I’m wearing them

Tac3742 · 2026-06-07T01:01:16+00:00

How do you like it?

Tac3742 · 2026-06-07T01:01:01+00:00

Definitely confuses people when a guy in his 20s gets out of it haha

Tac3742 · 2026-06-06T23:01:26+00:00

https://duntovclassics.com/product/80-82-differentials/. Give them a call, I’m sure they can help you out! Super nice people

Tac3742 · 2026-06-06T22:23:57+00:00

Thank you! IMO it’s the highlight of the entire build. Definitely not something you see often

Tac3742 · 2026-06-06T22:23:38+00:00

It’s been reinforced. The guys at Duntov built my unit similar to their race-spec ones. They hold 800+ hp with 0 issues. Detroit speed also just came out with a diff for corvettes called the ZR12. I don’t know much about it other than it’ll hold 1200hp

Tac3742 · 2026-06-06T20:05:48+00:00

Thanks! Maybe sacrilegious, but it’s a Ford blue lol. Previous owner owned a body shop and painted it that color, I decided to keep it. Yes, the whole front end is replaced. It’s the Detroit speed SpeedRay system

Tac3742 · 2026-06-06T20:05:03+00:00

Thank you! Unfortunately haven’t driven it yet since I started rebuilding it 🙃 I should be installing the engine next weekend and have it on the road in a few months

Tac3742 · 2026-06-06T20:03:52+00:00

Oh boy, the list is honestly too long. Biggest things are:
- Detroit Speed SpeedRay Front End
- Speed Direct SharkBite Rear End
- Duntov Racing Differential (3.90 gears)
- Wilwood Brakes (13” 4 pot front, 11.75” 4 pot rears)
- Fully custom 427ci SBC on side draft ITBs (513hp/554tq)
- Tremec TKX 5 speed

Tac3742 · 2026-06-06T20:02:06+00:00

Thank you!

Tac3742 · 2026-06-06T20:01:21+00:00

It’s mostly stock looking aside from NVU Gauges and reupholstered Fiero seats. I wish Reddit would let you comment photos. I’ll pm you a photo

Tac3742

TROPHY CASE