I have a jump starter with only 300 starting amps and 600 peak amps. It has a capacity of 18,000mAh/66.6Wh, whatever that means. It is made by DBPOWER, and I bought it on Amazon in July, 2019. It is advertised as a 600A portable jump starter. The one I bought has been replaced on Amazon with an 800A jump starter for $69.99 and free shipping.
It says 600A are good for gas V8 engines up to 6L, and has worked well for me on my 4.7L V8. 800A are supposedly good for a V8 engine up to 7.2L.
1000A should work for you. The NOCO is ~$100 on Amazon, and is advertised as good for up to a 6L gas engine. I have no personal experience with NOCO, but I have seen their jump starters at auto parts stores like AutoZone and Advance Auto Parts. My DBPOWER jump starter was Made in China.