andrewb70

Holley has a new drop-in module that uses their new hydramat. No need for a baffle... https://holley.com/products/fuel_systems/fuel_pumps_regulators_and_filters/fuel_pumps/efi_fuel_pumps/efi_in-tank_pumps/parts/12-130 Andrew

Also, the Holley terminator system uses the HP ECU. If you ever wanted to upgrade to a sequential, multi-point system, or even do a LS swap, it would just be a matter of getting a new harness. Andrew

The 69-72 Grand Prix also uses A-body suspension, like the Chevelles, GTOs, and Monte Carlos. Pontiac called that generation of Grand Prix a G-body. The difference between a GTO/Chevelle and a Grand Prix is that the Grand Prix had a 6" longer wheelbase (118" vs 68-72 GTO/Chevelle 112"). The Monte Carlo is an A-special and it has a 116" wheel base, which is 4" longer than a Chevelle. All of the extra length in the wheelbase of both the 69-72 Grand Prix and 70-72 Monte Carlos are ahead of the firewall. This is why the engine in a Monte sits so far back on the front crossmember compared to a Chevelle. Andrew

I am new here, because I like first get Monte Carlos (hopefully my next project), but I have done numerous LS swaps, most recently a 1967 Cougar and before that, my 1970 GTO. The best swap system for LS swaps right now is being made by Holley. They have engineered the mounts to place the engine as low as possible, which is accomplished by using their 302-2 oil pan. On a Monte the pan may not be needed because of the way that the engine sits on the front crossmember. I really like the Holley mounts because they use the factory 4th gen F-body engine mounts and combine that with custom brackets that bolt to the front crossmember. They also offer two positions for the engine and matching transmission crossmember for various transmission options. When I did my GTO swap, none of these parts were available and I was forced to use generic adapter plates and OEM frame stands. I had vibration issues at highway speed. The driveline alignment problems also get worse if the rear of the car is lowered (my GTO lowered 2-3" in the rear). The driveline alignment issues cannon be fixed with adjustable rear control arms because the issue is not getting the angles equal and opposite. The issue is that the u-joint operating angles get to be too big (anything over 3 degrees will cause vibrations at highway speeds). I ultimately fixed my vibration issues by using a driveshaft that uses a CV (think like a FWD axle) joint in the front. Hope this helps. Andrew