Big Block Conversion in '72 Blazer ?'s - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

hotrodtodd · 11-28-2013, 08:26 PM

I have installed a 454 in a 72 blazer used small block 4x4 mounts hei dist. had to gently massage firewall at distributor and lower corners of valve covers ran stock covers had to do the same on 71 swb pickup also 4x4

timski69gmc · 11-29-2013, 12:08 AM

Were both 4x's? Sounds like the 4x's have the engine set further back than the 2x's

**Blazer690** · 12-01-2013, 11:23 AM

The automatic trans mount on the frame is different. Big block only 2wd

my71chev · 12-28-2023, 06:13 PM

I know this is probably a long shop. But do you happen to have any dimensions on your cuts and recessed sections on the firewall?

11-28-2013, 08:26 PM	#26
hotrodtodd Registered User Join Date: Jan 2005 Location: princeton wv Posts: 257	Re: Big Block Conversion in '72 Blazer ?'s I have installed a 454 in a 72 blazer used small block 4x4 mounts hei dist. had to gently massage firewall at distributor and lower corners of valve covers ran stock covers had to do the same on 71 swb pickup also 4x4

11-29-2013, 12:08 AM	#27
timski69gmc Registered User Join Date: Nov 2009 Location: Cranbrook, BC Posts: 253	Re: Big Block Conversion in '72 Blazer ?'s Were both 4x's? Sounds like the 4x's have the engine set further back than the 2x's

12-01-2013, 11:23 AM	#28
Blazer690 Senior Member Join Date: Jan 2013 Location: Monrovia CA Posts: 453	Re: Big Block Conversion in '72 Blazer ?'s The automatic trans mount on the frame is different. Big block only 2wd

12-28-2023, 06:13 PM	#29
my71chev Registered User Join Date: Jul 2009 Location: kelso, washington Posts: 1	Re: Big Block Conversion in '72 Blazer ?'s I know this is probably a long shop. But do you happen to have any dimensions on your cuts and recessed sections on the firewall?



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