Progress Thread BluePrint 347 long block engine swap

Noobz347 · Dec 23, 2025

rednotch said:
Forgot man o war from world or who ever the hell owns the iron side of it now, but that things got alot of useless gimmicks built into the price

And a lot of extra weight from what I recall.

AeroCoupe · Dec 23, 2025

Lethal Performance has the Boss block for a little less than $2100 so hopefully the prices continue to fall.

FastDriver · Dec 23, 2025

I agree. For anything with more than 3.25" stroke, I prefer Dart, but for the $600 difference, I'd be happy to have the Boss.

rednotch · Dec 23, 2025

I still have an old NMRA real street neutral balanced 311 rotating assembly laying around, it ain't going in a cheap stock block

AeroCoupe said:
Lethal Performance has the Boss block for a little less than $2100 so hopefully the prices continue to fall.

I don't think lethal has updated it's site too well, they had stuff at pre covid prices for years when no one had any inventory. There about $2200 from most dealers now, ignore it and they should go lower, that thing was $1500 when they released it.

Sparky714 · Dec 27, 2025

So Santa brought me the valve covers I wanted. I got a 1" spacer because I knew I was probably going to need it. I mocked up the intake with the covers that came with the motor and had a little over an inch of clearance, so I thought these would work just fine. The sheet metal ones that it came with are about 3 1/2" tall on the header side and about 2 1/2" on the intake side. Of course I couldn't find any exact dimensions for the new ones, but they're about 3 1/2" on both sides. There's no gaskets under anything yet, but man is the throttle linkage going to be close. Do I need to go to a slant edge cover? I don't really like where the breather holes are on those. What other aluminum covers have similar dimensions to the sheet metal ones?

nickyb · Dec 27, 2025

That linkage is gonna hit for sure.A big ing hammer will fix it.

Noobz347 · Dec 27, 2025

I would not worry [too awful much] about the the breather holes...

I would imagine that there are baffles under each of those holes?

If so, you can stuff an elbow in there along a length of hose and put the actual breather into a bracket virtually, anywhere you like.

AeroCoupe · Dec 27, 2025

What throttle body is that? I have a 70mm BBK with the Motorsport valves covers with a 1” spacer and zero issues.

Wanted to add that the upper and lower are Edelbrock Performer RPM II’s.

Sparky714 · Dec 27, 2025

Noobz347 said:
I would not worry [too awful much] about the the breather holes...

I would imagine that there are baffles under each of those holes?

If so, you can stuff an elbow in there along a length of hose and put the actual breather into a bracket virtually, anywhere you like.

The holes on these are fine, I was talking about the slant edge version covers. I like these, just wondering about this clearance issue.

Sparky714 · Dec 27, 2025

AeroCoupe said:
What throttle body is that? I have a 70mm BBK with the Motorsport valves covers with a 1” spacer and zero issues.

Wanted to add that the upper and lower are Edelbrock Performer RPM II’s.

It's the 70mm SVE. I think I have a 65mm BBK in my parts box. I'll have to see if it's a little shorter. You don't happen to have any pictures of your setup?

AeroCoupe · Dec 27, 2025

I can get some here in a bit. Just got done seeing Rob Schneider.

rednotch · Dec 28, 2025

Wonder who bpe is using for hr lifters, few companies still making them, lots of reboxers and china ones now, plus the prices are getting ridiculous. Went to order a set of and my cheap source dryed up, used to be able to find decent new old stock set from Moresa, pretty easily on fleabay.

General karthief · Dec 28, 2025

A TB spacer will move it horizontally away from the VC, only need a half inch or so to clear from what I see in pics.
Just a thought.....maybe I shouldn't.....

nickyb · Dec 28, 2025

General karthief said:
A TB spacer will move it horizontally away from the VC, only need a half inch or so to clear from what I see in pics.
Just a thought.....maybe I shouldn't.....

What?you don't like much bfh suggestion.

Sparky714 · Dec 28, 2025

nickyb said:
What?you don't like much bfh suggestion.

Sparky714 · Dec 28, 2025

General karthief said:
A TB spacer will move it horizontally away from the VC, only need a half inch or so to clear from what I see in pics.
Just a thought.....maybe I shouldn't.....

Thought about that, but it might cause more clearance issues with my intercooler piping

Sparky714 · Dec 28, 2025

Mocked everything up with all the gaskets underneath and it looks like I can make it work. Friend of mine is an old racecar fabricator. He says he can make me a new throttle cable bracket and we can flip the ball stud to the top side of the bracket if necessary. Clearance does look a little better with all the gaskets in place though.

General karthief · Dec 29, 2025

nickyb said:
What?you don't like much bfh suggestion.

If it works sure

Sparky714 · Dec 29, 2025

Ordered a different set of valve covers. Going to see if those fit any better before I start modifying stuff

Monkeybutt2000 · Dec 29, 2025

Sparky714 said:
Ordered a different set of valve covers. Going to see if those fit any better before I start modifying stuff

Stock efi covers work great.

Progress Thread BluePrint 347 long block engine swap

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

AeroCoupe

lube between the nut and the face. I know my lubes

FastDriver

I was uncomfortably high & wearing a helmet

rednotch

I'd like to remain having one chocolate starfish

Sparky714

Attachments

nickyb

I gotta say i never painted my nuts, Never Ever

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

AeroCoupe

lube between the nut and the face. I know my lubes

Sparky714

Sparky714

AeroCoupe

lube between the nut and the face. I know my lubes

rednotch

I'd like to remain having one chocolate starfish

General karthief

wonder how much it would cost to ship you a pair

nickyb

I gotta say i never painted my nuts, Never Ever

Sparky714

Sparky714

Sparky714

Attachments

General karthief

wonder how much it would cost to ship you a pair

Sparky714

Monkeybutt2000

Mustang Master

Similar threads

Progress Thread BluePrint 347 long block engine swap

Stangnet Facilities Maint Tech... Er... Janitor

lube between the nut and the face. I know my lubes

I was uncomfortably high & wearing a helmet

I'd like to remain having one chocolate starfish

Attachments

I gotta say i never painted my nuts, Never Ever

Stangnet Facilities Maint Tech... Er... Janitor

lube between the nut and the face. I know my lubes

lube between the nut and the face. I know my lubes

I'd like to remain having one chocolate starfish

wonder how much it would cost to ship you a pair

I gotta say i never painted my nuts, Never Ever

Attachments

wonder how much it would cost to ship you a pair

Mustang Master

Similar threads

Privacy & Transparency

Privacy & Transparency